Do you mean text editor or IDE? Not many (if any) have support for CI out of the box but it can be setup as an include path.
I use PhpStorm, Netbeans & SublimeText on Windows, CentOs & Ubuntu Linux. I have also briefly used PHPEd and Komodo IDE. I mostly use PhpStorm as an IDE for developing php and SublimeText as a text editor. I used to use Netbeans for php, but just use it for other stuff now.
Yea hey, Vim & Emacs is very hardcore! lol
