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>
    <allredirects garcontinue="IBID_Server_Upgrade_Instructions|336" />
  </query-continue>
  <query>
    <pages>
      <page pageid="37" ns="0" title="International Burn Injury Database" />
      <page pageid="42" ns="0" title="Enter Burn Injury Data" />
      <page pageid="89" ns="0" title="IBID Demography" />
      <page pageid="129" ns="0" title="Search for data" />
      <page pageid="304" ns="0" title="IBID Record Type" />
      <page pageid="766" ns="0" title="Getting Started" />
      <page pageid="1056" ns="0" title="IBID -- Burn Injury Data" />
      <page pageid="1138" ns="0" title="Quick Start" />
      <page pageid="1143" ns="0" title="Aquila Server Installation" />
      <page pageid="1160" ns="0" title="Hardware Requirements" />
    </pages>
  </query>
</api>