bp_get_member_invitation_subject()

function bp_get_member_invitation_subject() {
	global $bp;

	$term = get_term_by('name', 'invites-member-invite', bp_get_email_tax_type() );

	$args = array(
		'post_type' => bp_get_email_post_type(),
		'tax_query' => array(
			array(
				'taxonomy' => bp_get_email_tax_type(),
				'field' => 'term_id',
				'terms' => $term->term_id
			)
		)
	);
	$query = new WP_Query( $args );

	$title = bp_get_member_invites_wildcard_replace( $query->posts[0]->post_title );

	return apply_filters( 'bp_get_member_invitation_subject', stripslashes( $title ) );
}