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="D184|1375" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1375" ns="0" title="Kinase Glossary" />
      <page pageid="2399" ns="0" title="Kinase Family SCYL" />
      <page pageid="2426" ns="0" title="Kinase Family SgK071" />
      <page pageid="2428" ns="0" title="Pseudokinases" />
      <page pageid="2430" ns="0" title="K72" />
      <page pageid="2433" ns="0" title="Kinase Group SAPPK" />
      <page pageid="2440" ns="0" title="Kinase Family IPPK" />
      <page pageid="2441" ns="0" title="Kinase Subfamily IP3K" />
      <page pageid="2443" ns="0" title="Kinase Family IPK" />
      <page pageid="2447" ns="0" title="D184" />
    </pages>
  </query>
</api>