[WP Cases] Add New Content Menu Item

function cases_add_new_content_menu_item( $wp_admin_bar ) {
    if ( ! post_type_exists( 'cases' ) || ! current_user_can( 'edit_posts' ) )
        return;

    $wp_admin_bar->add_menu( array(
        'parent'    => 'new-content',
        'id'        => 'new-case',
        'title'     => 'Дело',
        'href'      => admin_url( 'post-new.php?post_type=cases' )
    ) );
}
add_action( 'admin_bar_menu', 'cases_add_new_content_menu_item' );