I'm not sure whether you're confused about the terms you're using.

A CGI header isn't really something that exists .. there's an HTTP header which icnludes things like information about the cookie updates, and there's also whatever appears at the top of the web page, sy, a menu or something like that.

If you're talking about the first kind, then your CGI should be able to control what HTTP headers go out -- usually you're using the venerable CGI or something more advanced like CGI::Application so that you don't have to get your hands dirty actually sending out those kinds of headers yourself.

If you're talking about some kind of menu at the top of your page, then a templaet is probably what you're looking for .. I can highly recommend Template::Toolkit (and for the dyslexics in the audience, that's not Toolkit::Template) (see also the web site).

Think about those two options and see if you can give us more information on what you're looknig for. it's difficult to answer correctly if the question is not clear.