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="Beatrycze_Brandenburska" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="Baltazar Erdmann Promnitz" />
      <l ns="0" title="Baltazar Promnitz" />
      <l ns="0" title="Baptyści" />
      <l ns="0" title="Barania Góra" />
      <l ns="0" title="Baranowice" />
      <l ns="0" title="Barbara Cieszyńska" />
      <l ns="0" title="Barbara Karniowska" />
      <l ns="0" title="Barok" />
      <l ns="0" title="Barthel Stein" />
      <l ns="0" title="Bazylika Najświętszej Maryi Panny w Piekarach Śląskich" />
    </alllinks>
  </query>
</api>