have_posts()显示部分栏目
wordpress首页默认是显示所有栏目文章，加入如下粗体部分内容可以只显示id为2,4,5的栏目。
如果只想排除某个栏目，在栏目前添加减号cat=-3，表示显示除了id为3的栏目内容
<?php if ( have_posts() ) : ?>
<?php query_posts($query_string . '&cat=2,4,5');?>
<?php while ( have_posts() ) : the_post(); ?>
<?php get_template_part( 'content', get_post_format() ); ?>
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<?php endwhile; ?>
<?php endif; // end have_posts() check ?>
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查了那么多，就这个能用！！！