Update: Here is the final code I ended up using in my functions file:
class Footer_Walker extends Walker_Nav_Menu { function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) { $classes = empty($item->classes) ? array () : (array) $item->classes; $class_names = join(' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) ); !empty ( $class_names ) and $class_names = ' class="'. esc_attr( $class_names ) . '"'; $output .= "<div class='col-sm-6 col-md-3'>"; $attributes = ''; !empty( $item->attr_title ) and $attributes .= ' title="' . esc_attr( $item->attr_title ) .'"'; !empty( $item->target ) and $attributes .= ' target="' . esc_attr( $item->target ) .'"'; !empty( $item->xfn ) and $attributes .= ' rel="' . esc_attr( $item->xfn ) .'"'; !empty( $item->url ) and $attributes .= ' href="' . esc_attr( $item->url ) .'"'; $title = apply_filters( 'the_title', $item->title, $item->ID ); $item_output = $args->before . "<a $attributes>" . $args->link_before . $title . '</a></div>' . $args->link_after . $args->after; $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); } } And here's the code to generate the menu in your template:
<?php wp_nav_menu(array('menu' => 'Footer', 'items_wrap'=> '%3$s', 'walker' => new Footer_Walker(), 'container'=>false, 'menu_class' => '', 'theme_location'=>'footer', 'fallback_cb'=>false )); ?>