<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond $1 !^(php|jpg|jpeg|png|gif|js|css|robots\.txt)
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>