Tabs with Dropdowns of Contents rather than listed below
 

Hello,
In my vBulletin 4 forum, where I have tabs that say "What's New?" "Blogs" "Forum" "Home", etc, how can I make it so that whatever is on that second line (like when I have "Home" highlighted, it has, just beneath that, various choices, horizontally across the row beneath the tabs "The Front Page" "Documentation" "News" "Food" "Travel" etc)

I really want to make this appear when I roll the mouse over the each tab, just appear vertically from that tab, rather than all just appearing there horizontally as it is now.

It's too confusing as it is now.

Does anyone know how I can do this?