Required help

Hi firends,
i am working on a wordpress website. My client has demanded me a menu bar similar to
http://www.goldmansachs.com/
I you examine this menu bar, the sub menu have two vertical partitions, one is actually submenu option while on right hand side there is a discription type area which gets changed everytime the sub menu value is changed. I have tried ubermenu but i don’t how to do this in ubermenu, can any body help me suggesting me any pluggin similar to this functionality. THank you so much in advance.