Hide certain usergroups in whoisonline

[1master1]

I had created a usergroup bot which is having gid "13" and i added all the bots to that group. I gave the "Bot" group to view the forum and view the threads. Now i added all the bots to this group.

We see that when bots access the site, they are shown in who is online along with other members and its annoying to check who is member and who is bot.

Don't say that change the bot username style to different that you can find it easily

I dont want them to be appeared in who is online  for all groups. I just want the bots to visible by certain usergroups only, like Admin, SMod or Mod, so the staff can have a track of it on the live site.

I did the same as mentioned by tritop in index.php file from the host. But it didnt hided the bots.

I also tried by adding the <if statement to the fetch="bots" tag line, but it also failed.

Is there other way to achieve this?