RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php/$0 [PT,L]

RewriteRule ^(application|system|\.svn) index.php/$1 [L]
RewriteRule ^(.*)$ index.php/$1 [QSA,L]