获取单个自定义分类的文章列表
{foreach GetList(5,$flid) as $article}
{$article.Title}
{/foreach}获取多个自定义分类的文章列表，循环输出
{php}
$flids = explode(',','1,2,3,4,5');
{/php}
{foreach $flids as $flid}
{foreach GetList(5,$flid) as $article}
{$article.Title}
{/foreach}
{/foreach}
其中：1,2,3,4,5为分类ID
