how to make offline/invisible/hide on facebook chat to specified users?

to hide yourself on facebook chat to groups is not difficult task, but when you are asked/have to particularize means you have to hide your self to the specific users permanently/temporary, this task persist you think, how to hide or make invisible so for this purpose I have a solution that is so easy, first you have to make a list then you have to get on/off  on your wish quickest.

follow all the steps as shown in pictures:

before making visible or invisible follow all the steps as shown in above given picture

Inivisible Steps:

1. simply click on "Offline chat list" from the "LISTS"

2. add the friends in list to whom you want to disappear yourself on chat (as shown in picture step no.12)

Visible Steps:

1. simply click on "Offline chat list" from the "LISTS"

2. click on "See All" (as shown in picture step no.13) and then click on users to whom now you want to appear your self or want to remove from the invisible list.(as shown in picture step no.14,15)