whmcsProxmoxAddon/templates/admin/ui/core/default/appLayouts/navbarLeft.tpl

<div class="lu-app">
    <div class="lu-app-header lu-app-header--responsive lu-navbar">
        <a class="lu-navbar__brand lu-brand lu-brand--product" href="{$mainURL}">
            <div class="lu-brand__logo lu-product-{$tagImageModule}-for-whmcs i-c-5x">
                <img class="lu-i-c-3x" src="{$assetsURL}/img/products/{$tagImageModule}.svg" alt="{$mainName}">
            </div>
            <div class="lu-brand__text">
                {$mainName}
            </div>
        </a>
        <button class="lu-navbar__burger lu-navbar-right lu-btn" data-toggle="offCanvas" data-target=".app-navbar">
            <span class="lu-btn__icon lu-burger">
                <span></span>
                <span></span>
                <span></span>
            </span>
        </button>
    </div>
    <div class="lu-app-navbar lu-navbar lu-navbar--responsive lu-off-canvas-responsive lu-off-canvas-responsive--right">
        <div class="lu-navbar__top">
            <a class="lu-navbar__brand lu-brand lu-brand--product" href="{$mainURL}">
                <div class="lu-brand__logo lu-product-{$tagImageModule}-for-whmcs lu-i-c-6x">
                    <img class="lu-i-c-4x" src="{$assetsURL}/img/products/{$tagImageModule}.svg" alt="{$mainName}">
                </div>
                <div class="lu-brand__text">
                    {$mainName}
                </div>
            </a>
            <a class="lu-navbar__brand lu-brand lu-is-right" href="https://www.modulesgarden.com" target="_blank">
                <div class="lu-brand__logo">
                    <img src="{$assetsURL}/img/logo.png" alt="ModulesGarden" width="150">
                </div>
            </a>
        </div>
        <div class="lu-navbar__nav">
            <ul class="lu-nav lu-nav--h lu-is-left">
                {foreach from=$menu key=catName item=category}
                    {if $category.submenu}
                        <li class="lu-nav__item has-dropdown {if $currentPageName|strtolower === $catName|strtolower}is-active{/if}">
                            <a class="lu-nav__link" href="{$category.url}">
                                {if $category.icon}
                                    <i class="{$category.icon}"></i>
                                {/if}
                                {if $category.label}
                                    {$subpage.label}
                                    <span class="lu-nav__link-drop-arrow"></span>
                                {else}
                                    <span class="lu-nav__link-text">{$MGLANG->T('pagesLabels','label', $catName)}</span>
                                    <span class="lu-nav__link-drop-arrow"></span>
                                {/if}
                            </a>
                            <ul class="lu-nav lu-nav--sub">
                                {foreach from=$category.submenu key=subCatName item=subCategory}
                                    {if $subCategory.externalUrl}
                                        <li class="lu-nav__item">
                                            <a class="lu-nav__link" href="{$subCategory.externalUrl}" target="_blank">
                                                {if $subCategory.icon}<i class="{$subCategory.icon}"></i>{/if}
                                                {if $subCategory.label}
                                                    {$subCategory.label}
                                                {else}
                                                    <span class="lu-nav__link-text">{$MGLANG->T('pagesLabels', $catName, $subCatName)}</span>
                                                {/if}                                                        
                                            </a>
                                        </li>
                                    {else}
                                        <li class="lu-nav__item">
                                            <a class="lu-nav__link" href="{$subCategory.url}">
                                                {if $subCategory.icon}<i class="{$subCategory.icon}"></i>{/if}
                                                {if $subCategory.label}
                                                    {$subCategory.label}
                                                {else}
                                                    <span class="lu-nav__link-text">{$MGLANG->T('pagesLabels', $catName, $subCatName)}</span>
                                                {/if}                                                        
                                            </a>
                                        </li>                                         
                                    {/if}
                                {/foreach}
                            </ul>
                        </li>                            
                    {else}
                        <li class="lu-nav__item {if $currentPageName|strtolower === $catName|strtolower}is-active{/if}">
                            <a class="lu-nav__link" href="{if $category.externalUrl}{$category.externalUrl}{else}{$category.url}{/if}"
                               {if $category.externalUrl} target="_blank"{/if}>
                                {if $category.icon}
                                    <i class="{$category.icon}"></i>
                                {/if}
                                {if $category.label}
                                    {$subpage.label}
                                {else}
                                    <span class="lu-nav__link-text">{$MGLANG->T('pagesLabels','label', $catName)}</span>
                                {/if}
                                <span class="drop-arrow"></span>
                            </a>
                        </li>        
                    {/if}
                {/foreach}
            </ul>
        </div>
    </div>
    <div class="lu-app-main">
        <div class="lu-app-main__body">
            <div class="lu-app-main__top lu-top">
                <ul class="lu-breadcrumb lu-type-5">
                    {assign var="brKeys"  value=$breadcrumbs|array_keys}         
                    {foreach from=$breadcrumbs key=brKey item=brItem}
                        {if $brItem.name !== 'Index'}
                            <li class="lu-breadcrumb__item is-active">{if $brItem.url}<a class="lu-breadcrumb__link" href="{$brItem.url}">{if $brKeys[0] === $brKey}{$MGLANG->T('pagesLabels','label', $brItem.name)}{else}{$MGLANG->T('pagesLabels', $breadcrumbs[($brKey - 1)]['name'], $brItem.name)}{/if}</a>{else}<span class="breadcrumb__link">{if $brKeys[0] === $brKey}{$MGLANG->T('pagesLabels','label', $brItem.name)}{else}{$MGLANG->T('pagesLabels', $breadcrumbs[($brKey - 1)]['name'], $brItem.name)}{/if}</span>{/if}</li>
                                {/if}
                            {/foreach}
                </ul>
            </div>
            {if $error}
                <div class="lu-alert lu-alert--outline lu-alert--icon lu-alert--danger lu-alert--bordered lu-m-b-x lu-alert--dismiss mg-message">
                    <div class="lu-alert__body">
                        <b>{$error}</b>
                    </div>
                    <button type="button" class="lu-btn lu-btn--icon lu-btn--link lu-btn--close" data-dismiss="alert">
                        <i class="lu-btn__icon lu-zmdi lu-zmdi-close"></i>
                    </button>
                </div>                    
            {/if}
            {if $success}    
                <div class="lu-alert lu-alert--outline lu-alert--icon lu-alert--success lu-alert--bordered lu-m-b-x lu-alert--dismiss mg-message">
                    <div class="lu-alert__body">
                        <b>{$success}</b>
                    </div>
                    <button type="button" class="lu-btn lu-btn--icon lu-btn--link lu-btn--close" data-dismiss="alert">
                        <i class="lu-btn__icon lu-zmdi lu-zmdi-close"></i>
                    </button>
                </div>                
            {/if}
            {if ($isDebug eq true AND (count($MGLANG->getMissingLangs()) != 0))}
                <div class="lu-row">
                    <div class="lu-col-md-12">
                        <div class="lu-widget">
                            <div class="lu-widget__body">
                                <div class="lu-widget__content">
                                    <div class="lu-row">
                                        {foreach from=$MGLANG->getMissingLangs() key=varible item=value}
                                            <div class="lu-col-md-12"><b>{$varible}</b> = '{$value}';</div>
                                                {/foreach}
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            {/if}
            {$content}
        </div>
    </div>
</div>