How to make drop down menu with expanded links??

[afmarko99]

I have dropdown menus from my extra nav bar on my site but I want to add expanded menus. Example = http://www.teamwarfare.com/ Click on Forums. The arrows that point to the right that expand more forums is what I want.

My site www.thepublicenemy.net: Click on my extra nav bar under the main and click forums. I would like to be able to expand out like the above example.

I also am trying to set up my links so only certain usergroups can see certain links. If you guys want to help with that also I would appreciate it.

Thanks in advance for the help.