$args = array (
        'before'            => '<ul class="bbp-forums-list">',
        'after'             => '</ul>',
        'link_before'       => '<li class="bbp-forum">',
        'link_after'        => '</li>',
        'count_before'      => '',
        'count_after'       => '',
        'count_sep'         => '',
        'separator'         => '',
        'forum_id'          => '',
        'show_topic_count'  => true,
        'show_reply_count'  => true
);

bbp_list_forums( $args );