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 alcontinue="MESH_система|285" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="BDCOM S3740F" />
      <l ns="0" title="Cisco" />
      <l ns="0" title="Cisco 2950" />
      <l ns="0" title="Cisco e1" />
      <l ns="0" title="DNS" />
      <l ns="0" title="Extension:DynamicPageList (Wikimedia)" />
      <l ns="0" title="Extension:DynamicPageList (third-party)" />
      <l ns="0" title="Help" />
      <l ns="0" title="Linux и 33600 бод" />
      <l ns="0" title="Localisation" />
    </alllinks>
  </query>
</api>