I found this perl script can sort Xcode Project
just download it and run it
$ curl -O https://raw.github.com/WebKit/webkit/master/Tools/Scripts/sort-Xcode-project-file
$ chmod +x sort-Xcode-project-file
$ ./sort-Xcode-project-file MyProject.xcodeproj/project.pbxproj
you need to change MyProject to you xcode project name