Tabs ... duplicating content

Tabs ... duplicating content

Hi everybody

I've been working on this simple markup:  http://dl.dropbox.com/u/145581/PricingPlan/index.html and it works flawlessly.

But when I integrate it into our CMS the tabs are loading the entire website again inside the tabarea ...

Click 'se tilllægsmoduler' to see the tabs in action or see the attached image.

Any ideas ?

I've checked for clashing ID's but that doen't seem to be the problem.