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="Big_Thunder_Mountain" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2485" ns="0" title="Backlot Express" />
      <page pageid="1624" ns="0" title="Backlot Tour" />
      <page pageid="1841" ns="0" title="Barnstormer" />
      <page pageid="1966" ns="0" title="Be Our Guest" />
      <page pageid="1964" ns="0" title="Be Our Guest Restaurant" />
      <page pageid="2606" ns="0" title="Beast&#039;s Castle" />
      <page pageid="1653" ns="0" title="Beauty and the Beast Live On Stage" />
      <page pageid="1655" ns="0" title="Beauty and the Beast Live on Stage" />
      <page pageid="2740" ns="0" title="Beauty and the Beast Sing-Along" />
      <page pageid="2280" ns="0" title="Biergarten" />
    </pages>
  </query>
</api>