I use this method to allow the end user to invite friends:
FB.ui({method: 'apprequests', message: 'app message!', data:'tracking information for the user'});
The user receives an invitation with the facebook dialog box in which he can select the invitation:
- All friends
- users of my application (users who have installed / authorized the application)
- Friends for an invitation (those who do not have the application installed - my goal)
Or in a brief image:

I don’t want the end user to have a choice, just suggest the third option - those that do not have an application.
Can someone point me in the right direction? I am using php + facebook php sdk.
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