Prevent Parsing some nodes in XML documents

Hello Everyone.

I'm trying to use xml structure my pages. My problem was when I was embeding
html into xml documents.

adding <![CDATA[" html code "]]> resolves problem for reading. And if I
serialize any php array contains html code int xml problems repeating agin.

So ?

I'm asking is there any way to mark some xml nodes to prevent parsing?

Regards

Sancar