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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.
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<?xml version="1.0"?>
<api>
<query-continue>
<allcategories accontinue="80kg-100kg_Characters" />
</query-continue>
<query>
<allcategories>
<c size="0" pages="0" files="0" subcats="0" xml:space="preserve">"Secret" Identity</c>
<c size="1" pages="1" files="0" subcats="0" xml:space="preserve">100kg-150kg Characters</c>
<c size="3" pages="3" files="0" subcats="0" xml:space="preserve">170cm-179cm Characters</c>
<c size="2" pages="2" files="0" subcats="0" xml:space="preserve">180cm-189cm Characters</c>
<c size="4" pages="4" files="0" subcats="0" xml:space="preserve">190cm-199cm Characters</c>
<c size="0" pages="0" files="0" subcats="0" xml:space="preserve">200cm-219cm Characters</c>
<c size="1" pages="1" files="0" subcats="0" xml:space="preserve">200kg-300kg Characters</c>
<c size="0" pages="0" files="0" subcats="0" xml:space="preserve">300kg-400kg Characters</c>
<c size="7" pages="7" files="0" subcats="0" xml:space="preserve">4th Wall Breaker</c>
<c size="3" pages="3" files="0" subcats="0" xml:space="preserve">500kg-1000kg Characters</c>
</allcategories>
</query>
</api>