You want to use a URL rewrite
RewriteEngine On
RewriteRule ^(.*)\.html$ $1
You want to use a URL rewrite
RewriteEngine On
RewriteRule ^(.*)\.html$ $1
This should do it. It will rewrite a request to site.com/category/whatever.html to site.com/category/whatever. it shouldn't be dependent upon the requested file existing.
<Directory /var/www/category>
RewriteEngine on
RewriteRule (.*)\.html$ /category/$1
</Directory>
This is the format for apache2.conf or virtual host files. Not sure if you use the command in .htaccess. It's best to take care of it in the server conf, if you can, as that is only parsed once, on server startup, and htaccess is parsed on each request.
This will work to force an external redirection to your new URLs, but this may not be ideal for your situation. I'm still trying to think if there's a way to keep the redirection internal and update the variable that WordPress uses to determine which page to serve up, but so far I haven't thought of anything that would work.
Entire .htaccess
:
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} \.html$
RewriteRule ^(.*)\.html$ $1 [R=301,L]
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]