Sometime it is useful to work with more than one user on a PC, possibly because you what to have different rights (e.g. one member of administrators and one of users) and may be it is nice to get for all of them the same IE favorites. Placing favorites under the default profile doesn’t help because it only copies them to the users profile when a new profile is created but new added favorites will not be added to the all users favorites. The solution is to set all the users favorites to a specific folder changing the default setting of a regirtry key.

• Run regedit (right click on Start or search it with Cortana)

• On the Registry Editor window, navigate to the key below: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders\Favorites
  By default, its value should be %userprofile%\Favorites.
• Modify its value to point to a common folder (e.g. C:\Data\Favorites). Make sure that the accounts you want to share favorite have the full control permission on that folder.
• Copy on that folder (e.g. C:\Data\Favorites) all the favorite folder content [of the user that have the ones you want to share (e.g. C:\Users\myname)]: after having copied its content in the new shared folder, you can possibly delete the content of that folder if you like.

Also refer to the below link:
http://support.microsoft.com/kb/158787

The default value is %userprofile%\Favorites

Change the value to a specific folder

Note: Some serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
How to back up and restore the registry in Windows?
http://support.microsoft.com/kb/322756