whenever one of my clients is in there /www/ folder and they click the .. they will see all of my other clients folders and it will allow them to look inside of the folders but cannot make any changes. Is there a command that will fix this?

This is part of the discussion going on in the thread Protecting PHP source code on a Shared Server (http://www.webhostingtalk.com/showthread.php?s=&threadid=26266)
You might want to have a look at that one.

If it's not done yet, put all users in the same group, say "users".
Then
chgrp users /www
chmod 705 /www

If this is for ftp, check the ftp program and look for a chroot option, this will pretty much lock them from going anywhere under.