Replace that snippet with
%c = clientGroup.getObject(%i);
if(%c.isAdmin && %c != %client)
messageClient(%c,'',"\c7[\c5To Admins\c7]\c3" @%client.name@ "\c6:" SPC %col @ %message);
And after the loop, put
messageClient(%client,'',"\c7[\c5To Admins\c7]\c3" @%client.name@ "\c6:" SPC %col @ %message);