Put the below full code and that should work..
<?php class Description_Walker extends Walker_Nav_Menu {
function start_el(&$output, $item, $depth, $args)
{
$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 ) . '"';
// Build default menu items
$output .= "<li id='menu-item-$item->ID' $class_names>";
$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 ) .'"';
// Build the description (you may need to change the depth to 0, 1, or 2)
$description = ( ! empty ( $item->description ) and 1 == $depth )
? '<span class="nav_desc">'. $item->description . '</span>' : '';
$title = apply_filters( 'the_title', $item->title, $item->ID );
$item_output = $args->before
. "<a $attributes>"
. $args->link_before
. $title
. '</a> '
. $args->link_after
. $description
. $args->after;
// Since $output is called by reference we don't need to return anything.
$output .= apply_filters(
'walker_nav_menu_start_el'
, $item_output
, $item
, $depth
, $args
);
}
}
// Allow HTML descriptions in WordPress Menu
remove_filter( 'nav_menu_description', 'strip_tags' );
add_filter( 'wp_setup_nav_menu_item', 'cus_wp_setup_nav_menu_item' );
function cus_wp_setup_nav_menu_item( $menu_item ) {
$menu_item->description = apply_filters( 'nav_menu_description', $menu_item->post_content );
return $menu_item;
} ?>
and then use this in your template:
<?php wp_nav_menu( array( 'walker' => new Description_Walker )); ?>