wp_nav_menu change sub-menu class name?

Question

Is there a way to change the child

generated by WordPress itself to a custom class name?

I know the parent

Answer 1

replace class:

echo str_replace('sub-menu', 'menu menu_sub', wp_nav_menu( array(
    'echo' => false,
    'theme_location' => 'sidebar-menu',
    'items_wrap' => '
%3$s
' 
  ) )
);