plug-in your headphones by this jailbreak tweak called Auris. Auris jailbreak tweak brings perfect way of
managing your different music apps all at once! No more searching needed.
only need to connect a headphone or wireless headphone and Auris will
immediately let you choose which music app you want to open.
configure from Setting app.
step-by-step guide on how to jailbreak iOS 9 – iOS 9.0.2: