有时候会需要生成三级、四级导航，甚至更多，下面的代码，就是生成多级导航。<?php
$ecms_bq_sql=sys_ReturnEcmsLoopBq("select * from [!db.pre!]enewsclass where bclassid=2
有时候会需要生成三级、四级导航，甚至更多，下面的代码，就是生成多级导航。
<?php
$ecms_bq_sql=sys_ReturnEcmsLoopBq("select * from [!db.pre!]enewsclass where bclassid=2 order by myorder limit 7",14,24,0);
$bqno=0;
while($bqr=$empire->fetch($ecms_bq_sql))
{
$bqsr=sys_ReturnEcmsLoopStext($bqr);
$bqno++;
?>
<div class="bar"><h2><?=sub($bqr[classname],0,54,false)?></h2></div>
<?php
$ecms_bq_sql2=sys_ReturnEcmsLoopBq("select * from [!db.pre!]enewsclass where bclassid=$bqr[classid] order by myorder limit 8",14,24,0);
$bqno2=0;
while($bqr2=$empire->fetch($ecms_bq_sql2))
{
$bqsr2=sys_ReturnEcmsLoopStext($bqr2);
$bqno2++;
?>
<ul>
<li class="f"><h3><a href="<?=$public_r[newsurl]?><?=$bqr2[classpath]?>/" target="_blank"><?=sub($bqr2[classname],0,54,false)?></a></h3></li>
<li>
<?php
$ecms_bq_sql3=sys_ReturnEcmsLoopBq("select classid,classname,classpath from [!db.pre!]enewsclass where bclassid = $bqr2[classid] order by classid limit 100",0,24,0);
$bqno3=0;
while($bqr3=$empire->fetch($ecms_bq_sql3))
{
$bqsr3=sys_ReturnEcmsLoopStext($bqr3);
$bqno3++;
?>
<a href="<?=$public_r[newsurl]?><?=$bqr3[classpath]?>/" target="_blank"><?=sub($bqr3[classname],0,54,false)?></a>
<?php
}
?>
</li>
</ul>
<?php
}
?>
<?php
}
?>
案例：
<div class="home-banner-area mb-4 pt-3">
<div class="container">
<div class="row gutters-10 position-relative">
<div class="col-lg-3 position-static d-none d-lg-block">
<div class="aiz-category-menu bg-white rounded shadow-sm">
<div class="p-3 bg-soft-primary d-none d-lg-block rounded-top all-category position-relative text-left">
<span class="fw-600 fs-16 mr-3">Categories</span>
<a href="<?=$public_r[newsurl]?>e/tags/" class="text-reset">
<span class="d-none d-lg-inline-block">See All ></span>
</a>
</div>
<ul class="list-unstyled categories no-scrollbar py-2 mb-0 text-left">
<?php
$ecms_bq_sql=sys_ReturnEcmsLoopBq("select * from [!db.pre!]enewsclass where bclassid=2 order by myorder limit 11",14,24,0);
$bqno=0;
while($bqr=$empire->fetch($ecms_bq_sql))
{
$bqsr=sys_ReturnEcmsLoopStext($bqr);
$bqno++;
// 生成图标编号（01-11）
$icon_number = str_pad($bqno, 2, '0', STR_PAD_LEFT);
$icon_path = $public_r['newsurl'].'wp-content/public/icon/'.$icon_number.'.jpg';
?>
<li class="category-nav-element" data-id="<?=$bqr[classid]?>">
<a href="<?=$public_r[newsurl]?><?=$bqr[classpath]?>/" class="text-truncate text-reset py-2 px-3 d-block">
<img class="cat-image lazyload mr-2 opacity-60"
src="<?=$public_r[newsurl]?>public/assets/img/placeholder.jpg"
data-src="<?=$icon_path?>"
width="16"
alt="<?=$bqr[classname]?>"
onerror="this.onerror=null;this.src='<?=$public_r[newsurl]?>public/assets/img/placeholder.jpg';">
<span class="cat-name"><?=sub($bqr[classname],0,54,false)?></span>
</a>
<div class="sub-cat-menu c-scrollbar-light rounded shadow-lg p-4">
<div class="c-preloader text-center absolute-center">
<i class="las la-spinner la-spin la-3x opacity-70"></i>
</div>
<div class="sub-cat-content" style="display:none;">
<div class="sub-cat-container">
<?php
$ecms_bq_sql2=sys_ReturnEcmsLoopBq("select * from [!db.pre!]enewsclass where bclassid=$bqr[classid] order by myorder limit 8",14,24,0);
$bqno2=0;
$has_subcats = false;
while($bqr2=$empire->fetch($ecms_bq_sql2))
{
$bqsr2=sys_ReturnEcmsLoopStext($bqr2);
$bqno2++;
$has_subcats = true;
?>
<div class="sub-cat-item">
<h6 class="fs-14 fw-600 text-uppercase mb-2">
<a href="<?=$public_r[newsurl]?><?=$bqr2[classpath]?>/" class="text-reset"><?=sub($bqr2[classname],0,54,false)?></a>
</h6>
<ul class="list-unstyled pl-0">
<?php
$ecms_bq_sql3=sys_ReturnEcmsLoopBq("select classid,classname,classpath from [!db.pre!]enewsclass where bclassid = $bqr2[classid] order by classid limit 100",0,24,0);
$bqno3=0;
while($bqr3=$empire->fetch($ecms_bq_sql3))
{
$bqsr3=sys_ReturnEcmsLoopStext($bqr3);
$bqno3++;
?>
<li class="mb-1">
<a href="<?=$public_r[newsurl]?><?=$bqr3[classpath]?>/" class="text-reset opacity-60 fs-13 hov-text-primary"><?=sub($bqr3[classname],0,54,false)?></a>
</li>
<?php
}
?>
</ul>
</div>
<?php
}
if(!$has_subcats) {
echo '<div class="text-center py-4">No subcategories</div>';
}
?>
</div>
</div>
</div>
</li>
<?php
}
?>
</ul>
</div>
</div>
</div>
</div>
</div>
