<IfModule mod_rewrite.c>
  	RewriteEngine on
 
    RewriteCond $1 !^(index\.php|images|stylesheets|system/application/sources/)
 
    RewriteCond %{REQUEST_FILENAME} !-f
 
    RewriteCond %{REQUEST_FILENAME} !-d
 
    RewriteRule ^(.*)$ index.php?/
</IfModule>