Add a navigation bar like on Elgg Site for integration

elgg navi

hey there...

so you know how elgg has this fancy nav bar that runs across the site. the commuinty is just one tab?

i'd reeeeealy like to have that for my website, i really would. yet, i can't seem to find any documentation or tutorials to make that happen.

does anybody have  a clue on how to do this?

thanks so much.