language subdomains

I don't understand why you're not replacing the "replace" function.

Right after:

PHP Code:

if ( ! preg_match('#^(\w+:)?//#i', $uri))
{
$uri = site_url($uri);
} 


you just do this:

PHP Code:

// base_url needs to switch based on whether there is a language subdomain in use
$domain_parts = explode(".", $_SERVER['HTTP_HOST']);
$subdomain = array_shift($domain_parts);
$allowed_subdomains = array('es', 'it', 'de');
if (in_array($subdomain, $allowed_subdomains)) {
    // do your replacement URL stuff here
} 


Leave everything else the same.