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="三福氣體股份有限公司|137" />
  </query-continue>
  <query>
    <pages>
      <page pageid="5" ns="0" title="首頁" />
      <page pageid="133" ns="0" title="專欄:2012台灣500大企業名單(製造業)" />
      <page pageid="137" ns="0" title="專欄:2012臺灣500大企業名單(製造業)" />
      <page pageid="1640" ns="0" title="00" />
    </pages>
  </query>
</api>