해당 레이아웃 스킨을 수정.. 아래 처럼 (검색폼 부분을) 주석 처리 하세요.

<!--

<form action="{getUrl()}" method="post" id="isSearch">

  <input type="hidden" name="mid" value="{$mid}" />
  <input type="hidden" name="act" value="IS" />
  <input type="hidden" name="search_target" value="title_content" />
  <input name="is_keyword" type="text" class="inputText" title="keyword" />

  <input type="image" src="./images/{$layout_info->colorset}/buttonSearch.gif" alt="{$lang->cmd_search}" class="submit" />
  </form>
  -->