For others that have the same problem:

Add the following to your functions.php (I use “My custom functions” plugin for this purpose) :

// ability to use advanced layout editor for shop page so it doesn't break Zen Menu Logic on this page
add_theme_support( 'avia_custom_shop_page' );

// a filter to replace the primary menu on shop, product and product category pages
add_filter( 'wp_nav_menu_args', 'custom_primary_menu' );

function custom_primary_menu( $args ) {
  if ( (is_shop() || is_product() || is_product_category()) && ($args['theme_location'] == 'avia')) { 
    $args['menu'] = 'YOUR_MENU_NAME';
  }
  return $args;
}

Use avia for primary menu and avia2 for secondary

• This reply was modified 7 years, 9 months ago by Skelt0r.