<div class="ia-sorting">
    {lang key='by_name'}:
    <div class="btn-group m-r">
        <a class="btn btn-default" href="#" data-field="fullname" data-order="asc"><span class="fa fa-arrow-up"></span></a>
        <a class="btn btn-default" href="#" data-field="fullname" data-order="desc"><span class="fa fa-arrow-down"></span></a>
    </div>

    {lang key='by_registration_date'}:
    <div class="btn-group">
        <a class="btn btn-default" href="#" data-field="date_reg" data-order="asc"><span class="fa fa-arrow-up"></span></a>
        <a class="btn btn-default" href="#" data-field="date_reg" data-order="desc"><span class="fa fa-arrow-down"></span></a>
    </div>
</div>