Vertical drop down css menu stay on screen

Q: Does your full product include a dual horizontal navigation option?
I want my website to match my forum navigation. When a user
selects a link in the top navigation, it will take them to a webpage
related to that topic and show links in the submenu area. I don't want a
dropdown list to appear. I don't want it to show up only when you hover.
The submenu needs to appear and stay on screen as long as they are on page
related to the main nav tab or link.

A: Unfortunately it's impossible with CSS3Menu.