"X"표시의 왼쪽 메뉴 부분을 제거 하고싶습니다.

즉, 메뉴 구성이 <상단엔 메뉴, 하단엔 내용> 이런식으로 간결하게 가려고합니다.

어떻게 해야하는지 수정 부탁드립니다.



현재코드 (간결하게 가려고 로그인부분도 제거했습니다.)
-------------------------------------
<!-- js 파일 import -->
<!--%import("js/xe_official.js")-->

<!-- 레이아웃과 연동될 css 파일 import -->
<!--@if($layout_info->colorset == "white")-->
    <!--%import("css/white.css")-->
<!--@elseif($layout_info->colorset == "black")-->
    <!--%import("css/black.css")-->
<!--@else-->
    <!--%import("css/default.css")-->
<!--@end-->

<!--@if($layout_info->background_image)-->
<style type="text/css">
    body {  background:#FFFFFF url({getUrl()}{$layout_info->background_image}) repeat-x left top; }
</style>
<!--@end-->

<!--@if(!$layout_info->colorset)-->
 {@$layout_info->colorset = "default"}
<!--@end-->

<div id="bodyWrap">
 <div id="header">
  <h1><a href="{$layout_info->index_url}"><!--@if(!$layout_info->logo_image)--><img src="./images/{$layout_info->colorset}/zeroBoardXE.png" alt="ZeroBoard™  XE" class="iePngFix" /><!--@else--><img src="{$layout_info->logo_image}" alt="logo" border="0" class="iePngFix" /><!--@end--></a></h1>

  
  <!--GNB-->
  <ul id="gnb">
            <!-- main_menu 1차 시작 -->
            <!--@foreach($main_menu->list as $key => $val)--><!--@if($val['link'])-->
                <!--@if($val['selected'])-->
                    {@ $menu_1st = $val }
                <!--@end-->

                <li <!--@if($val['selected'])-->class="on"<!--@end-->><a href="{$val['href']}" <!--@if($val['open_window']=='Y')-->onclick="window.open(this.href);return false;"<!--@end-->>{$val['link']}</a></li>

            <!--@end--><!--@end-->
            <!-- main_menu 1차 끝 -->
  </ul>
  <!--//GNB-->

  <form action="{getUrl()}" method="post" id="isSearch">
            <input type="hidden" name="mid" value="{$mid}" />
            <input type="hidden" name="act" value="IS" />
           
  </form>

 </div>
 <div id="contentBody">
  <div id="columnLeft">

           
           
            <!--@if($menu_1st)-->
   <ol id="lnb">
                {@ $idx = 1 }
                <!--@foreach($menu_1st['list'] as $key => $val)--><!--@if($val['link'])-->
    <li <!--@if($val['selected'])-->class="on"<!--@end-->><a href="{$val['+ 'href']}" <!--@if($val['open_window']=='Y')-->onclick="window.open(this.href);return false;"<!--@end-->>{$val['link']}</a>

                    <!-- main_menu 3차 시작 -->
                    <!--@if($val['list'] && ($val['expand']=='Y'||$val['+ 'selected'+ ']) )-->
     <ul>
                    <!--@foreach($val['list'] as $k => $v)--><!--@if($v['link'])-->
      <li <!--@if($v['selected'])-->class="on"<!--@end-->><a href="{$v['href']}" <!--@if($v['open_window']=='Y'+ ')-->onclick="window.open(this.href);return false;"<!--@end-->>{$v['link']}</a></li>
                    <!--@end--><!--@end-->
     </ul>
                    <!--@end-->
    </li>
                {@$idx++}
                <!--@end--><!--@end-->
   </ol>
            <!--@end-->

  </div>
  <div id="columnRight">
            <!-- 컨텐츠 시작 -->
            {$content}

  </div>
 </div>
 <ul id="footer">
  <li class="first-child">
   <address>
   <a href="http://www.zeroboard.com" onclick="window.open(this.href);return false;"><img src="./images/{$layout_info->colorset}/powerdByZeroboard.gif" alt="Powered By ZeroBoard" width="106" height="5" /></a>
   </address>

  </li>

        <!--@foreach($bottom_menu->list as $key => $val)-->
  <li><a href="{$val['href']}" <!--@if($val['open_window']=='Y')-->onclick="window.open(this.href);return false;"<!--@end-->>{$val['link']}</a></li>
        <!--@end-->
 </ul>
</div>