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Menu Example

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gistfile1.php
PHP
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<?php
class nsr_nav extends Walker_Nav_Menu
{
// add classes to ul sub-menus
function start_lvl( &$output, $depth, $args = array()) {
// depth dependent classes
$indent = ( $depth > 0 ? str_repeat( "\t", $depth ) : '' ); // code indent
$display_depth = ( $depth + 1); // because it counts the first submenu as 0
$classes = array(
'sub-menu',
( $display_depth % 2 ? 'menu-odd' : 'menu-even' ),
( $display_depth >=2 ? 'sub-sub-menu' : '' ),
'menu-depth-' . $display_depth
);
$class_names = implode( ' ', $classes );
// build html
 
$output .= "\n" . $indent . '<ul class="' . $class_names . '">';
}
 
function end_lvl( &$output, $depth, $args = array()) {
$output .= "\n" . $indent . '<span></span></ul>';
}
 
function start_el( &$output, $item, $depth, $args ) {
global $wp_query;
// ****
static $count = 1;
if ( $depth == 0 ) {
$count = 1;
$old = get_option('parent_description');
if ( $item->post_content != $old ) {
update_option('parent_description', $item->post_content );
}
}
if ( $depth > 0 && $count < 2 ) {
$output .= '<li class="description">' . get_option('parent_description') . '</li>';
$count++;
}
// ****
 
$indent = ( $depth > 0 ? str_repeat( "\t", $depth ) : '' ); // code indent
// depth dependent classes
$depth_classes = array(
( $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ),
( $depth >=2 ? 'sub-sub-menu-item' : '' ),
( $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ),
'menu-item-depth-' . $depth
);
$depth_class_names = esc_attr( implode( ' ', $depth_classes ) );
// passed classes
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$class_names = esc_attr( implode( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) ) );
$output .= $indent . '<li id="nav-menu-item-'. $item->ID . '" class="' . $depth_class_names . ' ' . $class_names .'">';
// link attributes
$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 ) .'"' : '';
$attributes .= ! empty( $item->description ) ? ' data-description="'.esc_attr( $item->description ) . '"' : '';
$attributes .= ' class="menu-link ' . ( $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ) . '"';
 
$description = ( ! empty ( $item->description ) && 0 == $depth )
? '<li class="nav_desc">' . esc_attr( $item->description ) . '</li>' : '';
 
$item_output = sprintf( '%1$s<a%2$s>%3$s%4$s%5$s</a>%6$s',
$args->before,
$attributes,
$args->link_before,
apply_filters( 'the_title', $item->title, $item->ID ),
$args->link_after,
$args->after
);
// build html
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
}
 
 
}

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