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>
    <links plcontinue="1|0|CC2650_SensorTag_BuildYourOwnDevPack" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="12V 7AH SLA Low Voltage Disconnect" />
          <pl ns="0" title="6LOWPAN Contiki 6lbr SLIP Radio CC2650 SensorTag" />
          <pl ns="0" title="AU 915 928 The Things Network Australia Frequency Plan" />
          <pl ns="0" title="BeagleBoneBlack Boot Process" />
          <pl ns="0" title="BeagleBoneBlack Building Kernel" />
          <pl ns="0" title="BeagleBoneBlack Cape Manager" />
          <pl ns="0" title="BeagleBoneBlack Default uBoot Environment Variables" />
          <pl ns="0" title="BeagleBoneBlack IEEE802154 Microchip MRF24J40" />
          <pl ns="0" title="BeagleBoneBlack Upgrading uBoot" />
          <pl ns="0" title="Budget 802.15.4 6LoWPAN Protocol Analyser using Wireshark" />
        </links>
      </page>
    </pages>
  </query>
</api>