Update selector function

Change prev() to prevAll() to get correct Unordered List.

We have a code like

<li><a href="#">Link1</a>
    <ul>
        <li><a href="#">Sublink1</a></li>
   </ul>
   <div class="submenucontent">...</div>
</li>

Just after the .submenucontent mean menu add the .mean-expand link
In js I found jQuery(this).prev('ul').slideDown() - but there is no prev('ul') because of the submenucontent - with prevAll('ul') I am able to select the unordered list