为Typecho的子分类设置二级菜单
就是普通的分类，正常输出；有子分类的父级分类，输出后点击它会展开二级菜单里面有这个父级旗下的子分类。类似下面的两个GIF图片效果。
! 2999077510.gif 1
! 3212954768.gif 2<?php $this->widget('Widget_Metas_Category_List')->to($categorys); ?> <?php while($categorys->next()): ?> <?php if ($categorys->levels === 0): ?> <?php $children = $categorys->getAllChildren($categorys->mid); ?> <?php if (empty($children)) { ?> <li <?php if($this->is('category', $categorys->slug)): ?> class="active"<?php endif; ?>> <a href="<?php $categorys->permalink(); ?>" title="<?php $categorys->name(); ?>"><?php $categorys->name(); ?> <span class="badge"><?php $categorys->count(); ?></span></a> </li> <?php } else { ?> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" href="#" data-target="#"><?php $categorys->name(); ?> <b class="caret"></b></a> <ul class="dropdown-menu"> <?php foreach ($children as $mid) { ?> <?php $child = $categorys->getCategory($mid); ?> <li <?php if($this->is('category', $mid)): ?> class="active"<?php endif; ?>> <a href="<?php echo $child 'permalink' ?>" title="<?php echo $child 'name' ; ?>"><?php echo $child 'name' ; ?> <span class="badge" style="float:right;"><?php echo $child 'count' ; ?></span></a> </li> <?php } ?> </ul></li> <?php } ?><?php endif; ?><?php endwhile; ?>1 : https://magicblue.cn/usr/uploads/2023/09/1283361314.gif
2 : https://magicblue.cn/usr/uploads/2023/09/282444077.gif