Wordpress Nav Menu Walker

menu-walker.php

<?php
if ( ! class_exists( 'Snowflakes_Walker_Menu' ) ) {
	class MyTheme_Walker_Menu extends Walker_Nav_Menu {

		/**
		 * At the start of each element, output a <li> and <a> tag structure.
		 *
		 * Note: Menu objects include url and title properties, so we will use those.
		 */
		function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
			$item->classes = ( $item->object_id === get_the_ID() ) ? array_push( $item->classes, 'current' ) : $item->classes;

			$output .= sprintf( "\n<li class='%s'><a title='%s' class='nav-link' href='%s' %s>%s</a></li>\n",
				implode(' ', $item->classes),
				$item->title,
				$item->url,
				$item->target ? 'target="'. $item->target .'"' : '',
				$item->title
			);
		}
	}
}