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="Configurer_la_redirection_DNS_(Windows_Serveur_DNS)|6" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="BASICA" />
      <l ns="0" title="Berkeley Software Distribution" />
      <l ns="0" title="Blue hat" />
      <l ns="0" title="C sharp" />
      <l ns="0" title="Chess Titans" />
      <l ns="0" title="Code de la consommation" />
      <l ns="0" title="Common Internet File System" />
      <l ns="0" title="Compatible PC" />
      <l ns="0" title="Component Object Model" />
      <l ns="0" title="Configurer la redirection DNS (Windows Serveur DNS)" />
    </alllinks>
  </query>
</api>