add_action('bp_setup_nav', 'bp_wcfm_user_nav_item_modified', 98);
function bp_wcfm_user_nav_item_modified() {
    remove_action('bp_setup_nav', 'bp_wcfm_user_nav_item', 99);

    global $bp;

    if (!$bp || !$bp->displayed_user || !property_exists($bp->displayed_user, 'userdata') || !$bp->displayed_user->userdata || !$bp->displayed_user->id) return;

    $other_member_profile = false;

    if (is_user_logged_in()) {
        $current_user_id = get_current_user_id();
        if (wcfm_is_vendor($current_user_id) && ($current_user_id == $bp->displayed_user->id)) {
            $pages = get_option("wcfm_page_options");
            $wcfm_page = get_post($pages['wc_frontend_manager_page_id']);

            $args = array(
                'name' => $wcfm_page->post_title,
                'slug' => $wcfm_page->post_name,
                'default_subnav_slug' => $wcfm_page->post_name,
                'position' => 50,
                'screen_function' => 'bp_wcfm_user_nav_item_screen',
                'item_css_id' => $wcfm_page->post_name
            );

            bp_core_new_nav_item($args);
        } else {
            $other_member_profile = true;
        }
    } else {
        $other_member_profile = true;
    }

    if ($other_member_profile) {
        do_action('wcfm_buddypress_show_vendor_store_link', $bp->displayed_user->id);
    }
}