//CUSTOMIZER ITEM
add_action( 'admin_menu', 'register_custom_menu_link_2' );
function register_custom_menu_link_2(){
    add_menu_page( 'custom menu link', 'Customize', 'manage_options', 'any-other-url', 'pdog_custom_menu_link_2', 'dashicons-image-crop', 45 ); 
}

function pdog_custom_menu_link_2(){
    wp_redirect( '/wp-admin/customize.php', 301 ); 
	exit;
}