I have to place empty <li> element soon after first food selection in order to take advantage of edges and obtain preferred effect.
How's this completed in Wordpress?
Simply to make certain it's all obvious.. this really is current menu structure that Wordpress creates:

<ul>
 <li><a href='#'>item1</a></li>
 <li><a href='#'>item2</a></li>
 ...
</ul>

Things I require is:

<ul>
 <li><a href='#'>item1</a></li>
 <li class='empty-item'></li>
 <li><a href='#'>item2</a></li>
 ...
</ul>

Thank everyone.

In case your theme uses the Wordpress Menu's you can turn to Appearance>Menu's and give a "custom food selectionInch. Just place a # for that URL and title it anything you want. Click and also to put it within the menu products listed and drag it simply underneath the top food selection.