hal12b - 4:14 am on Jul 8, 2012 (gmt 0)

I'm helping a friend add code into the HTML view of a page and in HTML view it is ok even when I save it, but if I switch to Visual view, it adds this in some areas --> <![CDATA[

I don't want this code added. It's for an ad network and I am not supposed to edit their code at all. Any input? Thanks