See doc on PHP simplexmlelement

description with CDATA
SimpleXMLElement::__set_state(array(
   'title' => 'item link',
   'link' => 'http://www.itemlink.com',
   'pubDate' => 
  SimpleXMLElement::__set_state(array(
  )),
   'description' => 
  SimpleXMLElement::__set_state(array(
  )),
))