Why not just do it with HTML/CSS? It's cleaner, faster, and more stable.
You can see a sloppy example at my site(still under construction): http://inspireromance.com/
You can also see it here(even works in IE6): http://www.cssplay.co.uk/menus/multi-column.html
Finally, you can see how I used it as a facebook-like navbar at my xbox site here(inactive/non-xenforo): http://xboxnarc.com/