Wordpress wp_nav_menu walker

functions.php

<?php
	/*
	 *  Footer menu walker - just because wordpress sucks
	 *  See wp-includes/class-wp-walker.php for what the hell this does normally (Class Walker)
	 */
	class footer_menu_walker {
		/*
			Output we are aiming for:
			<div class="col">
				<h3>Some sub menu</h3>
				<ul>
					<li><a href="">Item A</a></li>
					<li><a href="">Item B</a></li>
					<li><a href="">Item C</a></li>
				</ul>
			</div>
		*/
		function __construct() {
			$this->wp_walker = new Walker_Nav_Menu();
		}

		/*
		 * This builds the menu item and returns it to the walker
		 */
		function write_menu($element, $depth=0) {
			$output = str_repeat("\t", $depth) . '<div class="col">' . "\n";
			$output .= str_repeat("\t", $depth+1) . '<h3>' . $element->{'title'} . '</h3>' . "\n";
			$output .= str_repeat("\t", $depth+1) . '<ul>' . "\n";

			foreach($element->{'children'} as $celement) {
				/* No point dublicating this */
				$this->wp_walker->start_el(&$output, $celement, $depth+2, array());

				/* Damn you wp for bunching stuff together */
				$output .= "\n";
			}

			$output .= str_repeat("\t", $depth+1) . '</ul>' . "\n";
			$output .= str_repeat("\t", $depth) . '</div>' . "\n\n";
			return $output;
		}

		/*
		 * This walks over the elements and splits them into parents or children
		 */
		function walk($elems) {
			$args = array_slice(func_get_args(), 1);
			$output = '';
			$elements = array();

			foreach ( $elems as $e) {
				if( $e->{'menu_item_parent'} === "0" ) {
					$e->{'children'} = array();
					$elements[ $e->{'ID'} ] = $e;
				} else {
					if( array_key_exists($e->{'menu_item_parent'}, $elements) ) {
						$elements[ $e->{'menu_item_parent'} ]->{'children'}[] = $e;
					} // If not it might be something other than a 2depth array - we only go to 2
				}
			}

			foreach($elements as $element) {
				$output .= $this->write_menu($element, $args[1]->{'depth'});
			}

			return $output;
		}
	}
?>