我正在尝试做一个由类别和子类别组成的菜单。对于每个子类别，我想显示该类别中的最新帖子。我试图用到处找到的代码创建一个walker，但现在它为每个项目显示相同的最新帖子，并且它位于父类别及其子类别之间。我如何获取好的类别，并仅显示子类别的最新帖子？这是我的代码：
class Custom_Walker_Nav_Menu extends Walker_Nav_Menu {
function start_el(&$output, $item, $depth, $args)
{
global $wp_query;
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$class_names = $value = '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
$class_names = ' class="'. esc_attr( $class_names ) . '"';
$output .= $indent . '<li id="menu-item-'. $item->ID . '" ' . $value . $class_names .'>';
$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 ) .'"' : '';
$prepend = '<strong>';
$append = '</strong>';
$description = '<div id="querySort"></div>';
$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
$item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
$item_output .= $description.$args->link_after;
$item_output .= '</a>';
$item_output .= $args->after;
//ajout du nb de posts
$submenus = $depth == 0 ? get_posts( array( 'post_type' => 'nav_menu_item', 'numberposts' => -1, 'orderby' => 'menu_order', 'order' => 'ASC', 'meta_query' => array( array( 'key' => '_menu_item_menu_item_parent', 'value' => $item->ID ) ) ) ) : false;
$item_output .= $submenus ? ' <span class="submenus-count">(' . count( $submenus ) . ')</span>' : '';
$item_output .= $args->after;
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
//add last post for each subcategories
$cat_name = esc_attr( $category->name);
$cat_name = apply_filters( 'list_cats', $cat_name, $category );
$list_recent_cat_post = '<ul class="show-hide">';
$args = array( 'numberposts' => 4, 'category_name' => $category->name );
$myposts = get_posts( $args );
foreach( $myposts as $mypost ) :
$list_recent_cat_post .= '<li><a href="' . get_permalink($mypost->ID) . '">' . $mypost->post_title . '</a></li>';
endforeach;
$list_recent_cat_post .= '</ul>';
$link = '<a href="' . get_category_link( $category->term_id ) . '" ';
if ( $use_desc_for_title == 0 || empty($category->description) )
$link .= 'title="' . sprintf(__( 'View all posts filed under %s' ), $cat_name) . '"';
else
$link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
$link .= '>';
$link .= $cat_name . '</a>';
if ( (! empty($feed_image)) || (! empty($feed)) ) {
$link .= ' ';
if ( empty($feed_image) )
$link .= '(';
$link .= '<a href="' . get_category_feed_link($category->term_id, $feed_type) . '"';
if ( empty($feed) )
$alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
else {
$title = ' title="' . $feed . '"';
$alt = ' alt="' . $feed . '"';
$name = $feed;
$link .= $title;
}
$link .= '>';
if ( empty($feed_image) )
$link .= $name;
else
$link .= "<img src='$feed_image'$alt$title" . ' />';
$link .= '</a>';
if ( empty($feed_image) )
$link .= ')';
}
if ( isset($show_count) && $show_count )
$link .= ' (' . intval($category->count) . ')';
if ( isset($show_date) && $show_date ) {
$link .= ' ' . gmdate('Y-m-d', $category->last_update_timestamp);
}
$link .= $list_recent_cat_post;
if ( isset($current_category) && $current_category )
$_current_category = get_category( $current_category );
if ( 'list' == $args['style'] ) {
$output .= "\t<li";
$class = 'cat-item cat-item-'.$category->term_id;
if ( isset($current_category) && $current_category && ($category->term_id == $current_category) )
$class .= ' current-cat';
elseif ( isset($_current_category) && $_current_category && ($category->term_id == $_current_category->parent) )
$class .= ' current-cat-parent';
$output .= ' class="'.$class.'"';
$output .= ">$link\n";
} else {
$output .= "\t$link\n";
}
}
}