template/form/control/dropdown.html
<div {$attributes}>
{$BeforeInput}{$AfterBeforeInput}
<div class="ui dropdown {$multipleClass} search selection {$disabledClass}" style="width: 100%;">
{$Input}
<i class="dropdown icon"></i>
<input class="search" {$disabled} style="width: 100%;">
<div class="default text">{$DefaultText}</div>
<div class="menu">
{Item}<div class="item" data-value="{$value}">{Icon}<i class="{$iconClass}"></i>{/Icon}{$title}</div>
{/Item}
</div>
</div>
{$AfterInput}{$AfterAfterInput}
</div>