If you are talking about your Contacts in your iPhone's Contacts list, then go to Settings>iCloud>Toggle on Contacts. They should now be backed up in iCloud when you do the next iCloud back up. Here's where to toggle contacts on:
If this is not what you look for, try being more specific about your need. I'm not sure what you mean by "My iPhone" to Contacts.
Sent from from my iPhone 5