Stop Safari sharing on iDevice
This feature is called Handoff. 


  When your Mac computers and iOS devices are within Bluetooth range of
  each other (about 33 feet or 10 meters), they can automatically “hand
  off” what you’re doing from one device to another. For example, you
  can start writing an email in Mail on your iPhone, then instantly pick
  up where you left off in Mail on your Mac.


Follow the steps to turn it off:


Open the Settings app on your iOS device
Scroll down and tap ‘General’
Next tap ‘Handoff’
Turn the ‘Handoff’ toggle off