Trovin · July 31, 2019 15:03
diff --git a/WP add class to primary menu item b/WP add class to primary menu item
 IN FUNCTIONS.PHP
 ----------------

 /**
 * Add class to primary menu item.
 */
 function atg_menu_classes($classes, $item, $args) {
    if($args->theme_location == 'menu-1') {
        $classes[] = 'main-nav__item';
    }
    return $classes;
 }
 add_filter('nav_menu_css_class','atg_menu_classes',1,3);