I assume it's in /templates/rmk/tpl/controllers/search.tpl ?
This code has to be edited:
<!-- tabs -->
<ul class="tabs tabs-hash">
{if $search_forms|@count > 0}
{foreach from=$search_forms item='search_form' key='sf_key' name='sformsF'}
{assign var='tab_phrase' value='listing_types+name+'|cat:$listing_types[$sf_key].Key}
<li {if $smarty.foreach.sformsF.first}class="{if $smarty.foreach.sformsF.first && !$keyword_search}active{/if}"{/if} id="tab_{$sf_key|replace:'_':''}">
<a href="#{$sf_key}" data-target="{$sf_key|replace:'_':''}">{$lang[$tab_phrase]}</a>
</li>
{/foreach}
{/if}
{assign var='ks_phrase' value='blocks+name+keyword_search'}
<li {if $keyword_search || !$search_forms}class="active"{/if} id="tab_keyword">
<a href="#keyword" data-target="keyword">{$lang.$ks_phrase}</a>
</li>
</ul>
<!-- tabs end -->