how disable XHTML

could we elaborate on the question a bit?

in the section comments have, it’s code;
XHTML: You can use these tags: <a href="" title=""> <b>
<blockquote cite=""> <em> <i> <strike> <strong>

i need disable it’s option

edit kses.php, the allowed tags are in there

thanks

I am having the same issue but I am lost.

edit kses.php, the allowed tags are in there

wp-includes/kses.php

I removed everyone except for these

XHTML: <a href="" title=""> < title=""></a>

Does anyone know?