переход в раздел

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE xsl:stylesheet>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output xmlns="http://www.w3.org/TR/xhtml1/strict" doctype-public="-//W3C//DTD XHTML 1.0 Strict//EN" encoding="utf-8" indent="yes" method="html" omit-xml-declaration="no" version="1.0" media-type="text/xml"/>
   
   <!-- МагазинГруппыТоваровНаГлавной -->
   
   <xsl:template match="/">
      <xsl:apply-templates select="/shop"/>
   </xsl:template>
   
   <!-- Шаблон для магазина -->
   <xsl:template match="/shop">
      <SCRIPT>
         <xsl:comment>
            <xsl:text disable-output-escaping="yes">
               <![CDATA[
               function show_hide_menu(id)
               {
               if (obj = document.getElementById(id)) {
               obj.style.display == 'none' ? obj.style.display = 'block' : obj.style.display = 'none';
               return false; }
               return true;
               }
               ]]>
            </xsl:text>
         </xsl:comment>
      </SCRIPT>
      
      
      <ul class="categories" id="shop_menu">
         <xsl:apply-templates select="group"/>
      </ul>
   </xsl:template>
   
   <!-- Шаблон для групп товара -->
   <xsl:template match="group">
      
      <!-- Если это подпункт (родитель не равен 0) - выводим слева от него тире -->
      
      <li class="bg_list">
         
         
         <a href="{/shop/path}{fullpath}" onClick="return show_hide_menu('{@id}');">
            <xsl:value-of disable-output-escaping="yes" select="name"/>
         </a>
         
         <!-- Если есть подгруппы -->
         <xsl:if test="group">
            <ul class="left_menu gray_link gray" id="{@id}" style="display: none; font-size: 10px;">
               <xsl:apply-templates select="group"/>
            </ul>
         </xsl:if>
      </li>
   </xsl:template>
</xsl:stylesheet>

onClick="return show_hide_menu('{@id}');"

<ul class="left_menu gray_link gray" id="{@id}" style="display: none; font-size: 10px;">

<xsl:variable name="display_style">
    <xsl:choose>
        <xsl:when test="@id = /shop/@current_group_id or count(.//group[@id = /shop/@current_group_id]) &gt; 0">block</xsl:when>
        <xsl:otherwise>none</xsl:otherwise>
    </xsl:choose>
</xsl:variable>

style="display: {$display_style}; font-size: 10px;"