help with mod rewrite and CI

[eluser]Waiel[/eluser]
Found the sloution and it worked fine ..

Code:

RewriteEngine on
RewriteCond $1 !^(index\.php|public|tmp|images|css|javascript|upload|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1


RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteCond %{HTTP_HOST} !^(www\.)?my-site\.com$ [NC]
RewriteCond %{HTTP_HOST} ^(www\.)?([^\.]+)\.my-site\.com$ [NC]
RewriteRule ^(.*)$ /index.php/groups/%2 [QSA,L]

hope it will help someone someday