Pathogen to install Vim plugins
cd ~/.vim/bundles git clone https://github.com/majutsushi/tagbar.git echo "nmap :TagbarToggle" >> ~/.vimrc
Restart Vim, open a file in Vim and then press F8. That will open a window on the right of your screen showing Classes, Functions, and Variables. Clicking (or moving cursor over top of them and hitting enter) will move the cursor in the other window to the location.
Ctags allow you to jump to the file of the classes you are calling, this was the one feature I really missed that PHPStorm did very well.
First you need to install ctags, I would recommend installing Mac Ports, then installing ctags with
port install ctags
After this you can generate your ctags for a project with
cd /your/project/directory/ ctags -R --languages=php .
Now you when the cursor is over a class name you can click Ctrl+] to jump to that file and Ctrl+T will jump back to the original file.
Simply Awesome.