there, really hope you can help! The site I'm making has

Hi there, really hope you can help! The site I'm making has two sections (Zakelijk and Theater). I need a different menu in the header on the different sections (the menu starting with 'Wie ben ik'. I'm pretty sure that worked before. But now if I change the menu on one page, it changes on all the pages. Also in the other section . How do I solve this!?