I would like to use a custom header, like
But I cannot modify the templates easily where the calls are being made due to several reasons. (many files and same code base deployed on several different domains where some domains must not load the new header and use the same templates, so i want to load the new header on one place with a condition based on domain)
Is there any way I could make a hook and call the header function with the parameter myself, but then NOT calling the usual default call?
//die or something
Any tips appreciated.