RewriteEngine On
RewriteBase /przykladowa_strona/
RewriteCond $1 ^(application|system)
RewriteRule ^(.*)$ index.php/access_denied/$1 [PT,L]
RewriteCond $1 ^(index\.php|data)
RewriteRule ^(.*)$ - [PT,L]
RewriteRule ^(.*)$ index.php/$1 [PT,L]