<IfModule mod_rewrite.c>
RewriteRule ^s/(.*)$ index.php?slug=$1 [QSA]
RewriteEngine on 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteCond %{REQUEST_FILENAME}.php -f 
RewriteRule ^(.*)$ $1.php 
RewriteRule ^([a-z]+)\/?$ $1.php [NC]  
</IfModule>

