whmcsDNSManager/modules/addons/DNSManager2/templates/admin/pages/zones/modal/switch-item.tpl

<div class="modal modal-lg" id="edit-set-modal">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">{$MGLANG->T('close')}</span></button>
                <h4 class="modal-title">{$MGLANG->T('change_related_item')}</h4>
            </div>
            <div class="modal-body">
                <form class="form-horizontal">
                    <input type="hidden" name="id" value="{$id}" />
                    <div class="form-group">
                        <label for="si1" class="col-sm-3 control-label">{$MGLANG->T('related_item')}</label>
                        <div class="col-sm-7">
                            <select class="select2" id="si1" name="relateditem">
                                {foreach from=$items item="item"}
                                    <option value="{$item.type}|{$item.relid}" {if $item.type eq $type && $item.relid eq $relid}selected=""{/if}>{$item.name}</option>
                                {/foreach}
                            </select>
                        </div>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default btn-inverse" data-dismiss="modal">{$MGLANG->T('close')}</button>
                <button type="button" class="btn btn-primary btn-inverse" data-act="switchRelatedItemSave">{$MGLANG->T('save_changes')}</button>
            </div>
        </div><!-- /.modal-content -->
    </div><!-- /.modal-dialog -->
</div><!-- /.modal -->