Do you wanna control exactly who is going to see your post on your wall of facebook. If yes, then there is an app just maded for you called Friend Manager. Friend Manager gives you control over who sees your information on Facebook in a simple way means all you have to do is just drag and drop friends from one friend list to another to make it work.
This app is made by Mike Hudack who is also current product manager of facebook so it makes this an unofficial app. This app gives three widgets Regular Friends, Close Friends, and Acquitances. At first time your friends manager list is automatically generated by Facebook based on your usage then you can drag your friends from one group to another and your changes will get automatically saved after that you can then set your privacy setting according to your wishes.