PHP post particular content to facebook

I currently developing this website "http://ift.tt/1NUrjaz". I have few different content to be ready to post to facebook if user clicked the "Share" button. But when user click the share button it share the whole page which i don't wish to do that, how can i only share on the particular post's content to facebook but not the whole website page?

I had try to implement facebook api in it, but it still alway share the whole page instead of only the particular content to faccebook.

Please guide me through this. Thanks