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I want to replace below class with active class in menu:




I am already using a menu callback which add a class dropdown in child menu:

class foundation_navigation extends Walker_Nav_Menu {

function start_lvl(&$output, $depth) {
    $indent = str_repeat("\t", $depth);
    $output .= "\n$indent<a href=\"#\" class=\"dropdown-toggle\"><span> </span></a><ul class=\"dropdown\">\n";

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[] = 'has-dropdown';
        Walker_Nav_Menu::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );
share|improve this question
up vote 0 down vote accepted

Add this line at top of your display element function:

add_filter('nav_menu_css_class', 'add_active_class_to_nav_menu');

Add this line at bottom of your display element function:

remove_filter('nav_menu_css_class', 'add_active_class_to_nav_menu');

Add this function somewhere in your themes functions.php:

function add_active_class_to_nav_menu($classes) {
    if (in_array('current-menu-item', $classes, true) || in_array('current_page_item', $classes, true)) {
        $classes = array_diff($classes, array('current-menu-item', 'current_page_item', 'active'));
        $classes[] = 'active';
    return $classes;
share|improve this answer
why using remove_filter('nav_menu_css_class', 'add_active_class_to_nav_menu'); Only works when I dont use remove filter. – user1983017 Mar 18 '13 at 0:15
remove_filter is to remove the functionality of replacing classes. I added it so that this doesn't affect any of the other menus you might have on your site. As for it not working, make sure you're adding remove_filter line at the bottom of the function – Mridul Aggarwal Mar 18 '13 at 6:18
thanks for explain. I want to override all menu in my site. Thanks – user1983017 Mar 18 '13 at 7:25
In that case, you don't need remove_filter. Also copy the add_filter line from inside the display_element function to directly in your functions.php, otherwise it will not work in case you decide not to use the walker in future. – Mridul Aggarwal Mar 18 '13 at 8:11

Search for current_page_item. I found it four times total in post-template.php and nav-menu-template.php. Then replace it with active.

share|improve this answer
Please do not encourage people to hack Core files. It leads to nothing but heartache. – s_ha_dum Jul 26 '13 at 20:40

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