Web Design Help needed with navigation menu

I am planning to use "Online movie store template" for my clubs website. For this I need your help with editing the negation menu a bit.

I have already deleted the search box below the navigation menu since we aren’t planning to sell anything, however I do need to make the navigation menu stretch for the full length of the page instead of ending at the point where the navigation options end.

Can some one please tell me how do I do this?

 

How about this then? (See attachments)