RewriteRule ^(.*),(.*).html$ /index.php?uid=$2&element=strona [L]
RewriteCond %{REQUEST_FILENAME} !(images|css|js)
RewriteCond %{REQUEST_FILENAME} !admin
RewriteCond %{REQUEST_FILENAME} !index.php
RewriteRule ^(.*)$ /index.php?uid=$1&element=kategoria [L]