Home Shariing is not accessible from Control Center, AirPlay is but not Home Sharing.
The "Shared" option is found in the "More ..." section, bottom-right of Music app in iOS 7. If you don't have a "More ..." selection, then maybe a Reset or Restore is in order, since that is how you not only access Home Sharing but also how you get the "Edit" button to rearrange the categories in the Music app "tray" at the bottom.
If you manage to get the "More..." option in view, note that you won't see the "Shared" option unless (a) your iTunes library is up and running on the host computer, and (b) your iPad is on the same Wi-Fi network as the computer, and (c) Home Sharing is turned on and you're logged into the same Apple ID for Home Sharing.