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="Current_Software_Versions|1" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="LAMP Host Knowledge Base" />
      <page pageid="2" ns="0" title="Email" />
      <page pageid="7" ns="0" title="Control Panel" />
      <page pageid="11" ns="0" title="DNS" />
      <page pageid="15" ns="0" title="SSH" />
      <page pageid="20" ns="0" title="Site Manager" />
      <page pageid="24" ns="0" title="Lost Password" />
      <page pageid="26" ns="0" title="Domain Name Registration" />
      <page pageid="33" ns="0" title="Common Billing Questions" />
    </pages>
  </query>
</api>