I used to symbolicate the crash report in Xcode 5.1.1 directly as there was \"Symbolicate & Re-symbolicate\" in Devices section of Organiser. But after upgrading to Xcod
Simply connect an iOS device, open Devices > The Device > View Device Logs, then drag and drop the crash to the list of crash files for the that device. The crash will be added to the list and will be symbolicated as long as the original archive exist.