@
G33kgod
I see your phone is jailbroken. Did you update or install any cydia tweak / app since the last time you saw the alphabets ? I guess a tweak (possibly related to music) has caused this. Remove that tweak and see.
As an alternate restart your phone and while it is restarting press the volume up button to enter in Safe mode and then check the music app whether the alphabets reappear.