src/views/admin/partials/groups/add-members.tpl
<input class="form-control" type="text" placeholder="[[global:search]]"/>
<div class="list-group" id="search-result">
{{{each users}}}
<a href="#" class="list-group-item" data-username="{users.username}" data-uid="{users.uid}"><i class="fa fa-fw fa-check invisible"></i> {users.username}</a>
{{{end}}}
</div>