MyBB Community Forums

I am stuck on a project and all my options are getting shot down. So giving it my last go.

Is it possible to take the header template and fully recoding it and have the option to call it manually?

Basically I like mybb forum but I am trying to create a site that looks better than just the mybb forum. I want to create a nice header and forum with nice drop down menus and such. I would like to integrate wordpress header and footer so I could change it in wordpress but that won't work perfectly.

So basically I want a complete standalone site. Then when you go to the forum the header and footer is the same. Also does anyone know of a cms I could use for it?

Since you said, you are familiar with MyBB, let me explain it quicly, without any plugin
1. store header and footer in php variables, say $my_header and $my_footer
2. include that php file in global.php (mybb)
in your header and footer templates, replace existing codes and paste these php variables as {$my_header} and {$my_footer}

I don't know much about MyBB how ever this works in my MyBB forum.