Emlog之TangStyle模板修改首页导航为树状显示

继修改了的侧边栏模板后，修改首页导航便变得轻车熟路了，现在我带大家一起来学习Emlog之TangStyle模板修改首页导航为树状显示，先看一下效果图。

下面来讲讲方法，我们还是打开module.php，找到以下源代码：

<?php
function blog_navi(){ global $CACHE; $navi_cache = $CACHE->readCache('navi'); ?>
	<ul id="nav">
	<?php  foreach($navi_cache as $value): if($value['type'] == 3 && (ROLE == 'admin' || ROLE == 'writer')): ?>
			<li><a href="<?php echo BLOG_URL; ?>admin/write_log.php">写日志</a></li>
			<li><a href="<?php echo BLOG_URL; ?>admin/">管理站点</a></li>
			<li><a href="<?php echo BLOG_URL; ?>admin/?action=logout">退出</a></li>
			<?php  continue; endif; $newtab = $value['newtab'] == 'y' ? 'target="_blank"' : ''; $value['url'] = $value['isdefault'] == 'y' ? BLOG_URL . $value['url'] : trim($value['url'], '/'); $current_tab = (BLOG_URL . trim(Dispatcher::setPath(), '/') == $value['url']) ? 'current' : 'common'; ?>
		<li class="<?php echo $current_tab;?>"><a href="<?php echo $value['url']; ?>" <?php echo $newtab;?>><?php echo $value['naviname']; ?></a></li>
	<?php endforeach; ?>
	</ul>
<?php }?>

<?php
//blog：导航
function blog_navi(){
	global $CACHE; 
	$navi_cache = $CACHE->readCache('navi');
	?>
	<ul class="bar">
	<?php
	foreach($navi_cache as $value):
		if($value['url'] == ROLE_ADMIN && (ROLE == ROLE_ADMIN || ROLE == ROLE_WRITER)):
			?>
			<li class="item common"><a href="<?php echo BLOG_URL; ?>admin/write_log.php">写文章</a></li>
			<li class="item common"><a href="<?php echo BLOG_URL; ?>admin/">管理站点</a></li>
			<li class="item common"><a href="<?php echo BLOG_URL; ?>admin/?action=logout">退出</a></li>
			<?php 
			continue;
		endif;
		$newtab = $value['newtab'] == 'y' ? 'target="_blank"' : '';
        $value['url'] = $value['isdefault'] == 'y' ? BLOG_URL . $value['url'] : trim($value['url'], '/');
        $current_tab = BLOG_URL . trim(Dispatcher::setPath(), '/') == $value['url'] ? 'current' : 'common';
		?>
		<li class="item <?php echo $current_tab;?>">
			<a href="<?php echo $value['url']; ?>" <?php echo $newtab;?>><?php echo $value['naviname']; ?></a>
			<?php if (!empty($value['children'])) :?>
            <ul class="sub-nav">
                <?php foreach ($value['children'] as $row){
                        echo '<li><a href="'.Url::sort($row['sid']).'">'.$row['sortname'].'</a></li>';
                }?>
			</ul>
            <?php endif;?>
		</li>
	<?php endforeach; ?>
	</ul>
<?php }?>