[kh99]

One problem is that the 4th parameter to print_membergroup_row() is expected to be userdata, so you'd have to do something like this:

$userarray = array('usergroupid' => 0, 'membergroupids' => $forum['cts_reportgr']);
print_membergroup_row($vbphrase[‘mylabelphrase’], 'forum[cts_reportgr]', 2, $userarray);

Also, you must have had to add a 'cts_reportgr' column to the forum table, and also make that a valid field in the forum data manager? In the data manager it should be something like this:

            'cts_reportgr' => array(TYPE_ARRAY_INT, REQ_NO, VF_METHOD, 'verify_list'),

That way the array that's given to the data manager will be converted to a comma-separated list when saved in the database.