> How can I keep httrack to convert all the links that
> originally end in .php to .html . 
> I want to conserve the original names of all links

Humm, this would render the downloaded site unbrowsable, so this feature has
never been really possible. You may try to use the MIME type association from
php to text/html (--assume php=text/html or in the GUI, MIME types, php <=>
text/html)