whmcsDNSManager/modules/addons/DNSManager2/templates/admin/pages/settings/modal/set-duplicate.tpl

<div class="modal fade 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('set_duplicate')}</h4>
            </div>
            <div class="modal-body">
                <form class="form-horizontal">
                    <input type="hidden" name="id" value="{$set.id}" />
                    <div class="form-group">
                        <label for="" class="col-sm-2 control-label">{$MGLANG->T('name')}</label>
                        <div class="col-sm-10">
                            <input type="text" class="form-control" name="name" value="{$set.name}" required pattern="{$patterns.no_white_chars_at_beginning}">
                        </div>
                    </div>
                    <div class="form-group">
                        <label for="" class="col-sm-2 control-label">{$MGLANG->T('duplicate_with_client')}</label>
                        <div class="col-sm-10 checkbox">
                            <input type="checkbox" id="" name="duplicateWithClient" checked/>
                        </div>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">{$MGLANG->T('close')}</button>
                    <button type="button" class="btn btn-primary btn-inverse" data-act="setDuplicate">{$MGLANG->T('duplicate')}</button>
            </div>
        </div><!-- /.modal-content -->
    </div><!-- /.modal-dialog -->
</div><!-- /.modal -->