The utility of the Cydia - Springtomize 2 successfully eliminates this problem, you can fix that in three simple steps.
Steps to Fix White Icons After Jailbreaking
Step 1: Open Springtomize 2.
Step 2: Disable and then enable Springtomize, then press "Reload" in the upper right corner and the "Reload Settings" pop-up dialog.
Step 3: On the series will notice "Reloading Settings", "Cleaning Caches" and "Rendering Icons", then the white icons are replaced by the appropriate application icons.
Springtomize 2 - Fix White Icons After Jailbreaking [VIDEO]
The method is convenient, because it doesn't require a reboot, and this way is easy to use.