hi, if you go on your phone and go to Settings > iCloud and toggle the Contacts to on then you should be get a message saying do you want to merge your contacts with your iPhone's just click on merge.
but i would get a back up of my icloud before i did this if i was you.
Archive the information in iCloud Contacts
Use your Mac or Windows contacts application to create an archive on your computer.
- In OS X Lion v10.7.2 Address Book, select All Contacts in the Groups list, and then choose File > Export > Export vCard.Address Book creates one vCard file (.vcf) containing all of the contacts.
- To learn how to archive contacts from Microsoft Outlook 2007 or Microsoft Outlook 2010, open the application’s help and search for “export.”