Adds the user input class from appearance>menu to the body class group, using add_filter and body_class

bodyMenuClass.php

add_filter('body_class','get_custom_menu_classes');
function get_custom_menu_classes($classes) 
{
          $items = wp_get_nav_menu_items( 7 );
          
          foreach ($items as $item):
                $menuClasses = $item->classes;
                $objectId = $item->object_id.' ';
                
                if ( is_page($item->object_id) ):
                    $current[] = $menuClasses;
                endif;
                
               
            
          endforeach;
        
          $classes[] =  $current[0][0];
        

        return $classes;
}