[@robin-w Moderator 12 years, 6 months ago]

ahh! that’s it

difference between

‘bbp_before_get_topic_subscribe_link_parse_args’

and

bbp_before_get_topic_subscription_link_parse_args

So

function hide_before2 ($args = array() ) {
$args['before'] = '';
return $args;
}
add_filter ('bbp_before_get_topic_subscription_link_parse_args','hide_before2');

will do it !