## Rewrite something.domain.com/... to something.domain.com/...
RewriteCond %{ENV:REDIRECT_STATUS} ^$ 
RewriteCond %{HTTP_HOST} ^((.+)\.)?((site)\.(com))$ [NC]
RewriteCond $1 !^(index\.php|runtime|robots\.txt|assets)
RewriteRule ^(.*)$ http://%{HTTP_HOST}/index.php/%2%{REQUEST_URI} [QSA,L]