This question has been answered by multiple community members. See the first response.
[[getResources? &parents=`[[UltimateParent? &topLevel=`3`]]` &tpl=`tpl_sk3_levi_meni_pomembnoTpl` &showHidden=`1` &includeTVs=`1` &processTVs=`1` &tvFilters=`tv_pomembno==1` ]]
<li> <div class="pod_nivo"> <a href="[[~[[+id]]]]">[[+pagetitle]]</a> </div> </li>
<li [[+id:is=`[[*id]]`:then=`class="active"`:else=``]]> <div class="pod_nivo"> <a href="[[~[[+id]]]]">[[+pagetitle]]</a> </div> </li>
And if you need a active class...