A way to force drop-down menus always open?

I have a client that would like multi-lined menus like this: ITEM 1, ITEM 2 ITEM 3

ITEM1 ITEM2 ITEM3
ITEM4
ITEM5

Her theme currently has drop down menus and I realized the easiest way to do this would be to create Item 1 with multiple drop downs and simply figure out how to keep all menu items open instead of waiting for a hover to open.
Any ideas on how to do this would be great.