@barisusakli works perfectly

src/socket.io/admin/categories.js

@@ -113,12 +113,18 @@ Categories.setGroupPrivilege = function(socket, data, callback) {
 Categories.groupsList = function(socket, cid, callback) {
 	groups.list({
 		expand: false,
+		isAdmin: true,
 		showSystemGroups: true
 	}, function(err, data) {
 		if(err) {
 			return callback(err);
 		}
 
+		// Remove privilege groups
+		data = data.filter(function(groupObj) {
+			return groupObj.name.indexOf(':privileges:') === -1;
+		});
+
 		async.map(data, function(groupObj, next) {
 			privileges.categories.groupPrivileges(cid, groupObj.name, function(err, privileges) {
 				if(err) {