MyBB Community Forums

Are there any plugin or something which can make tabs inside each category?

"Inside" ?? Can you please provide any demo or screenshot of what exactly you like tabs to look like ?

Closest to this: http://community.mybb.com/thread-62039.html

Mean like http://www.mybbcentral.com/thread-2439.html

But instead of being in index.php I would like it to be in forumdisplay, and show difference forums as tabs.