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>
    <tags>
      <tag name="visualeditor" displayname="&lt;a href=&quot;/w/index.php?title=WikiWegge:VisualEditor&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;WikiWegge:VisualEditor (siden er ikke skrevet endnu)&quot;&gt;VisualEditor&lt;/a&gt;" description="Redigeret ved hjælp af [[Project:VisualEditor|VisualEditor]]" hitcount="1" />
      <tag name="visualeditor-needcheck" displayname="&lt;a href=&quot;/w/index.php?title=WikiWegge:VisualEditor&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;WikiWegge:VisualEditor (siden er ikke skrevet endnu)&quot;&gt;VisualEditor: Tjek&lt;/a&gt;" description="Redigering foretaget ved hjælp af [[Project:VisualEditor|VisualEditor]] hvor systemet har registreret at wikiteksten muligvis har utilsigtede ændringer." hitcount="0" />
      <tag name="visualeditor-switched" displayname="&lt;a href=&quot;/w/index.php?title=WikiWegge:VisualEditor&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;WikiWegge:VisualEditor (siden er ikke skrevet endnu)&quot;&gt;VisualEditor: Switched&lt;/a&gt;" description="User started to edit using VisualEditor then changed to the wikitext editor." hitcount="0" />
    </tags>
  </query>
</api>