wordpress-drop-down-menus-with-a-custom-walker

wordpress-drop-down-menus-with-a-custom-walker-1.php

<?php
class Dropdown_Walker_Nav_Menu extends Walker_Nav_Menu {
    function display_element($element, &$children_elements, $max_depth, $depth=0, $args, &$output) {
        $id_field = $this->db_fields['id'];
        if(!empty($children_elements[$element->$id_field])) {
            $element->classes[] = 'dropdown';
        }

        Walker_Nav_Menu::display_element($element, $children_elements, $max_depth, $depth, $args, $output);
    }
}

wordpress-drop-down-menus-with-a-custom-walker-2.php

<?php
if(in_array('dropdown', $classes)) $item_output .= ' <b class="caret"></b>';

wordpress-drop-down-menus-with-a-custom-walker-3.php

<?php
$element->title .= ' <b class="caret"></b>';

wordpress-drop-down-menus-with-a-custom-walker-4.php

<?php
class Dropdown_Walker_Nav_Menu extends Walker_Nav_Menu {
    function display_element($element, &$children_elements, $max_depth, $depth=0, $args, &$output) {
        $id_field = $this->db_fields['id'];
        if(!empty($children_elements[$element->$id_field])) {
            $element->classes[] = 'dropdown';

            $element->title .= ' <b class="caret"></b>';
        }
 
        Walker_Nav_Menu::display_element($element, $children_elements, $max_depth, $depth, $args, $output);
    }
}