They are adding PHP framework support to the new release. CodeIgniter happens to be one of them. To quote their blog:
We at Sun have been working on a PHP editor in NetBeans IDE. The first full-featured version will go out in our 6.5 release, scheduled for November, but it’s available for use already in our daily builds. [...] We’re not PHP developers, strictly speaking, we’re developing a tool for PHP developers. However, we are trying to get as much feedback from PHP developers as possible.
Vote for CodeIgniter to get added, right now, Symfony is ahead by 200+ votes…
Go here and see http://blogs.sun.com/netbeansphp/
then go here to vote for CI