How to make wp dropdown category load with selected option on top?

if the currently selected item has some type of identifier on it (maybe class=”current”) you may be able to use some jquery to grab it’s value, hide it, then move it to the top.

<div class="topdiv">
this is top div
</div>

<ul>
<li>1</li>
<li class="current">2</li>
</ul>

(function() {
var top = $(‘.current’).html();
$(‘.current’).hide();
$(‘.topdiv’).text(top);
})();

this worked in testing