Create a campaign specifically for Facebook. Select this link on how to: Share Your Message with Campaigns
Please note that you will need to be logged in to Facebook to use this.
After you have created your Facebook Campaign, take the link and enter it in the Facebook debugger: https://developers.facebook.com/tools/debug/ .
Place your campaign URL in and slect Debug.
Once Debugged you can place your Campaign link where ever you would like within Facebook.