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="Big_Bang_-_하루_하루" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="Babies and childbirth" />
      <l ns="0" title="Banking and investing" />
      <l ns="0" title="Baseball" />
      <l ns="0" title="Basic Geo Vocabulary" />
      <l ns="0" title="Belajar Hangeul" />
      <l ns="0" title="Berkontribusi" />
      <l ns="0" title="Bg:" />
      <l ns="0" title="Big Bang - 거짓말" />
      <l ns="0" title="Big Bang - 마지막 인사" />
      <l ns="0" title="Big Bang - 붉은 노을" />
    </alllinks>
  </query>
</api>