Make a selected tab unclickable.

I've made this tabbing system you can see here: link

My only problem is that even once you select a tab, it still remains clickable, so it just reloads the same div over and over if you keep clicking it.

I've tried using .unbind("click") but I can seem to make a tab clickable again once it's unselected.

Anyone know how to fix this?

Help would be greatly appreciated.