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Adding Pure.css menu classes to WordPress menus

Update: The code below has been updated to work with nested menus with drop-downs.

In Pure.css 0.6.0 the structure of menus has been changed to use a specific class for the <ul> container, <li> item and <a> link:

  • pure-menu-list
  • pure-menu-item
  • pure-menu-link

…respectively.

So if you're generating your navigation in WordPress using the built-in Menus you're going to need to get these classes into your HTML elements.

WordPress provides a function called 'Walker' which is not something I would begin to pretend to understand fully, I just know the following code works:

Add this to your theme's functions.php

class Pure_Menu_Walker extends Walker {

	var $db_fields = array('parent' => 'menu_item_parent', 'id' => 'db_id');
	
	function start_lvl(&$output, $depth = 0, $args = array()) {
		$indent = str_repeat("", $depth);
		$output .= "$indent
    "; } function end_lvl(&$output, $depth = 0, $args = array()) { $indent = str_repeat("", $depth); $output .= "$indent
"; } function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) { global $wp_query; $indent = ($depth) ? str_repeat("", $depth) : ''; $class_names = $value = ''; $classes = empty($item->classes) ? array() : (array) $item->classes; /* Add active class */ if (in_array('current-menu-item', $classes)) { $classes[] = 'active'; unset($classes['current-menu-item']); } /* Check for children */ $children = get_posts(array('post_type' => 'nav_menu_item', 'nopaging' => true, 'numberposts' => 1, 'meta_key' => '_menu_item_menu_item_parent', 'meta_value' => $item->ID)); if (!empty($children)) { $classes[] = 'has-sub pure-menu-has-children pure-menu-allow-hover'; } $class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args)); $class_names = $class_names ? ' class="pure-menu-item ' . esc_attr($class_names) . '"' : ''; $id = apply_filters('nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args); $id = $id ? ' id="' . esc_attr($id) . '"' : ''; $output .= $indent . ''; $attributes = ! empty($item->attr_title) ? ' title="' . esc_attr($item->attr_title) .'"' : ''; $attributes .= ! empty($item->target) ? ' target="' . esc_attr($item->target ) .'"' : ''; $attributes .= ! empty($item->xfn) ? ' rel="' . esc_attr($item->xfn ) .'"' : ''; $attributes .= ! empty($item->url) ? ' href="' . esc_attr($item->url ) .'"' : ''; $item_output = $args->before; $item_output .= ''; $item_output .= $args->link_before . apply_filters('the_title', $item->title, $item->ID) . $args->link_after; $item_output .= ''; $item_output .= $args->after; $output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args); } function end_el(&$output, $item, $depth = 0, $args = array()) { $output .= ""; } }

Then call your menu like this

    'main-menu', 'walker' => new Pure_Menu_Walker(), 'items_wrap' => '%3$s', 'container' => false) ); ?>

You should then end up with the correct classes in the correct places to continue using Pure.css menus.

Enjoy!