使用例子：调用全部分类
{foreach $categoriesbyorder as $categorynav}
<li><a href='{$categorynav.Url}'>{$categorynav.Name}</a></li>
{/foreach}调用字段
var_dump($categoriesbyorder); ["ID"]=> string(1) "1" ["Name"]=> string(12) "分类标题" ["Order"]=> string(1) "0" ["Type"]=> string(1) "0" ["Count"]=> string(1) "2" ["Alias"]=> string(13) "uncategorized" ["Group"]=> string(0) "" ["Intro"]=> string(12) "分类描述" ["RootID"]=> string(1) "0" ["ParentID"]=> string(1) "0" ["Template"]=> string(0) "" ["LogTemplate"]=> string(0) "" ["Meta"]=> string(0) ""