Выпадающее горизонтальное/вертикальное меню на CSS

<li>
         <xsl:attribute name="class">
            <xsl:if test="$current_structure_id = @id or count(.//structure[@id=$current_structure_id]) = 1">active</xsl:if>
            <!--<xsl:if test="position() = last()">last</xsl:if>-->
            <xsl:if test="$sub">has-sub</xsl:if>
         </xsl:attribute>
         
         <!-- Определяем адрес ссылки -->
         <xsl:variable name="link">
            <xsl:choose>
               <!-- Если внутренняя ссылка -->
               <xsl:when test="link != ''">
                  <xsl:value-of disable-output-escaping="yes" select="link"/>
               </xsl:when>
               <!-- Если внешняя ссылка -->
               <xsl:otherwise>
                  <xsl:value-of disable-output-escaping="yes" select="url"/>
               </xsl:otherwise>
            </xsl:choose>
         </xsl:variable>
         
         <!-- Показывать ссылку? -->
         <a href="{$link}">
            <span><xsl:value-of disable-output-escaping="yes" select="name"/></span>
         </a>
         
         <!-- Максимальный уровень вложенности -->
         <xsl:variable name="max_level" select="/*/max_level"/>
         
         <xsl:if test="$sub and count(ancestor::*) &lt; $max_level or $max_level = 0">
            <ul>
               <xsl:apply-templates select="$sub" />
            </ul>
         </xsl:if>
      </li>

      <li>
         <xsl:attribute name="class">
            <xsl:if test="$current_structure_id = @id or count(.//structure[@id=$current_structure_id]) = 1">active</xsl:if>
            <!--<xsl:if test="position() = last()">last</xsl:if>-->
            <xsl:if test="$sub">has-sub</xsl:if>
         </xsl:attribute>
        
         ...
        
         <xsl:if test="$sub and count(ancestor::*) &lt; $max_level or $max_level = 0">
            <ul>
               <xsl:apply-templates select="$sub" />
            </ul>
         </xsl:if>
      </li>


   <xsl:if test="position() mod 5 = 0 and position() != last()">
      <xsl:text disable-output-escaping="yes">
         &lt;/ul&gt;
         &lt;ul&gt;
      </xsl:text>
   </xsl:if>