存在excluded-cat 和excluded-cat-1 要从索引中排除的类别：

add_action(\'wp_head\',\'AS_exclude_category_from_indexing\');

function AS_exclude_category_from_indexing(){
  $html="";
  if(has_category(\'excluded-cat\') || has_category(\'excluded-cat-1\')){
    $html= "<meta name=\\"robots\\" content=\\"noindex,follow\\">".PHP_EOL;
  } 
  echo $html;
}