I have a dropdown menu shown here:

LINK-
http://www.tocdocs.com/new/index.040113.php

If you rollover the "Doctors" button in the main menu navigation you will see that I have split the buttons into three columns. The issue is when you do not have an even number of li's in the list then the last sub menu item (shown in the bottom right hand corner) does not have a orange stroke above it since there is no li to style. Can someone help me to figure out a way to extend the border-top so that the orange line is visible?

Thanks in advance,
Todd