src/Views/filter_list_lookup.blade.php
<label class="col-md-2 control-label">
{!! $column1 !!}
</label>
<div class="col-md-3">
{!! $column2 !!}
</div>
<div class="col-md-7">
<div class="input-group">
{!! $column3 !!}
<span class="input-group-btn">
{!! Html::button()->addClass('action-remove-row btn btn-danger')->text('X') !!}
</span>
</div>
</div>