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>
    <alllinks>
      <l ns="0" title="BaashidoĊ›" />
      <l ns="0" title="Badania Biologa 1" />
      <l ns="0" title="Badania Biologa 10" />
      <l ns="0" title="Badania Biologa 11" />
      <l ns="0" title="Badania Biologa 12" />
      <l ns="0" title="Badania Biologa 13" />
      <l ns="0" title="Badania Biologa 14" />
      <l ns="0" title="Badania Biologa 15" />
      <l ns="0" title="Badania Biologa 16" />
      <l ns="0" title="Badania Biologa 17" />
    </alllinks>
  </query>
  <query-continue>
    <alllinks alcontinue="Badania_Biologa_18" />
  </query-continue>
</api>