here's how you do it (in mac osx):
* make sure the project view is visible: cmd+1 or View > Tool Windows > Project
* click the settings icon (cog wheel) in the project view > select Autoscroll from Source
references:
PhpStorm 8.0.2 Help/Project Tool Window
Autoscroll from Source
"If this option is on, PhpStorm automatically navigates from a file in the editor to the corresponding node (file, class, field, method, etc.) in the Project tool window."PHPstorm project navigation