Think that your FB Timeline profile is  (http://facebook.com/Your_name) and your fan page is (http://facebook.com/page/Your_page_name/1245678998) and you want to convert your fanpage url to be http://facebook.com/Your_page_name/


Follow these instructions:

  1.     Login and Go to Profile to Business Page Migration
  2.     Click a category for your Page
  3.     Select a more specific category from the dropdown menu and fill out the required information
  4.     Click to check the box next to I agree to Facebook Pages Terms
  5.     Click Get Started


Note:

For full access to Pages features, manage your new Page from a personal account or give someone a role on your Page.

When you convert your personal account to a Facebook Page, FB will transfer your current profile picture and add of all your friends and followers as people who like your Page.

Your account’s username will become the username for your Page, and the name associated with your personal account will become your Page’s name.

If you want your Page to have a different name, consider creating a new Page.

Just Suggestion:
Download your info, such as all of your sent and received messages and all of the photos and videos you’ve uploaded to Facebook.

Appoint a new group admin to any groups you manage. You’ll be unable to manage groups once the conversion begins.

see the change
http://facebook.com/posmetro