Add-on Tabbed Navigation

[Frigeri]

Is it hard to make an add-on that creates tabs above the node list, making the user able to switch between categories instantly? Like this one:

http://www.mybbcentral.com/thread-7687.html

Example:
http://www.hackforums.net/

How much such add-on would cost?

Thanks...

 

[Frigeri]

No one?

 

[Jake Bunce]

I have seen this requested before. I am not aware of an addon exactly like this. NodesAsTabs is similar:

http://xenforo.com/community/resources/nodes-as-tabs.9/

But it's not exactly what you want.