Loading partial-views

Hi everyone,
I have a website showing a header on top, under the header on the left a menu and on the right (next to the menu) the main-content. When I click a menu-entry I wanted codeigniter to load only a partial-view for the main-content-area and not loading the header and menu again. Is there any mechanism (may be a helper which I didn't find right now) in codeigniter for this or do I have to use routes, js and DOM-exchange.
Thanx in advance for answering my question
Kind regards, Andreas