ecshop简单三部实现导航分类二级菜单

 1.在page_header.lbi对应的位置（你想显示导航的位置）插入

  (注意下面的"themes/模板名称/util.php"中的"模板名称"改成你模板文件夹的名称)

<?php
    require_once("themes/模板名称/util.php");
?>
<div class="header-menu">
             <p {if $navigator_list.config.index eq 1} class="cur" {/if}><a href="../index.php">{$lang.home}</a></p>
                <ul>
                  <!-- {foreach name=nav_middle_list from=$navigator_list.middle item=nav} -->
                   <li onMouseOver="sw_nav(this,1);" onMouseOut="sw_nav(this,0);" {if $nav.active eq 1} class="curs"{/if}>
                   <a href="{$nav.url}" {if $nav.opennew eq 1}target="_blank" {/if}>{$nav.name}</a>
                  <?php
                                  $subcates = get_subcate_byurl($GLOBALS['smarty']->_var['nav']['url']);
                             if($subcates!=false)
                        {
                                if(count($subcates)>0)
                            {
                                    echo "<div class='sub_nav'>";

                                if($subcates)
                                {
                                foreach($subcates as $cate)
                                {
                                        echo "<a href='".$cate['url']."' class='level_1'>".$cate['name']."</a>";

                                }
                                }
                                echo "</div><iframe frameborder='0' scrolling='no' class='nomask'></iframe>";
                            }
                        }
                             ?>
                   </li>
                 <!-- {/foreach} -->
            </ul>
      <script type="text/javascript">
      //初始化主菜单
                function sw_nav(obj,tag)
                {

                        var subdivs = obj.getElementsByTagName("DIV");
                        var ifs = obj.getElementsByTagName("IFRAME");

                        if(subdivs.length>0)
                        {

                                if(tag==1)
                                {
                                        subdivs[0].style.display = "block";
                                        ifs[0].style.display = "block";
                                }
                                else
                                {
                                        subdivs[0].style.display = "none";
                                        ifs[0].style.display = "none";
                                }

                        }
                }

      </script>
</div>

2.在CSS文件中插入

.header-menu p{ float:left;padding:1px 12px 1px 0;margin-top:-2px;}
.header-menu  ul li{float:left;padding:1px 12px 1px 12px;margin-top:-2px;}
.header-menu ul li a,.header-menu p a{color: #333;display:block;}
.header-menu ul li a:hover,.header-menu p a:hover{color:#888;}
.header-menu ul li.curs{background:#999;}
.header-menu ul li.curs a{color:#fff;}

.sub_nav{ background:#999;110px; position:absolute; z-index:5003; display:none;margin-left:-12px;}
.nomask{ background:#fff; 110px; height:50px; position:absolute; z-index:5002;display:none;margin-left:-12px;}
.sub_nav a.level_1{ display:block;color:#fff;padding:6px 6px 6px 13px;font:11px Tahoma,Verdana,PMingLiU,Arial;border-bottom:1px dotted #D1D1D1;*border-bottom:1px dotted #D1D1D1 !important;*border-bottom:1px solid #A8A8A8;}
.sub_nav a.level_1:hover{color:#fff;background:#55B46C;text-decoration:none;}

3.把以下代码编辑成(util.php)解压出来拷贝到模板目录下