CSS Library: Horizontal CSS Menus: Here
Matt Black Tabs
Author: Dynamic Drive
There's often beauty in simplicity. Matt Black Tabs is a clean CSS list menu that uses no images, and very small in footprint. Each tab is floated left to achieve its look and all contained in a wrapper that negate the need to manually clear "float" for the contents that immediately follow.
Note: Make sure your page contains a valid doctype for this menu to render properly.