You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Configuring_postback_for_7offers.ru" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Campaign Creation" missing="" />
      <page ns="0" title="Campaign Statistics" missing="" />
      <page ns="0" title="Click-to-Click Statistics" missing="" />
      <page pageid="1455" ns="0" title="CPA Target campaign creating" />
      <page pageid="1261" ns="0" title="CTR increase" />
      <page pageid="1268" ns="0" title="Campaign statistics" />
      <page pageid="1279" ns="0" title="Category macro transfer" />
      <page pageid="1269" ns="0" title="Click statistics" />
      <page pageid="1596" ns="0" title="Clickunder" />
      <page pageid="1762" ns="0" title="Configuring mobytize" />
    </pages>
  </query>
</api>