Повторение текстового элемента средствами XSL n-раз

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE xsl:stylesheet>
<xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   xmlns:hostcms="http://www.hostcms.ru/"
   exclude-result-prefixes="hostcms">
   <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">
      <h4>
         <xsl:value-of disable-output-escaping="yes" select="name"/>
      </h4>
      <ul id="catalog_menu">
         <xsl:apply-templates select="shop_group"/>
      </ul>
   </xsl:template>
   
   <!-- Шаблон для групп товара -->
   <xsl:template match="shop_group">
      <xsl:variable name="current_group_id" select="/shop/current_group_id"/>
      <xsl:variable name="parent_id" select="parent_id"/>
      <xsl:variable name="level" select="count(ancestor::shop_group)"/>
      <xsl:if test="$parent_id = 0">
         <div class="dots" />
      </xsl:if>
      <li>
         <xsl:choose>
            <xsl:when test="$current_group_id = @id">
      <xsl:call-template name="dup">
            <xsl:with-param name="input">_</xsl:with-param>
            <xsl:with-param name="count">$level</xsl:with-param>
        </xsl:call-template>
               <xsl:value-of disable-output-escaping="yes" select="name"/>
            </xsl:when>
            <xsl:otherwise>
      <xsl:call-template name="dup">
            <xsl:with-param name="input">&#160;</xsl:with-param>
            <xsl:with-param name="count">$level</xsl:with-param>
        </xsl:call-template>
               <a href="{url}" hostcms:id="{@id}" hostcms:field="name" hostcms:entity="shop_group">
                  <xsl:value-of disable-output-escaping="yes" select="name"/>
               </a>
            </xsl:otherwise>
         </xsl:choose>
         
         <!-- Если есть подгруппы -->
          <xsl:if test="shop_group">
            <ul id="{@id}">
               <xsl:apply-templates select="shop_group"/>
            </ul>
         </xsl:if>
      </li>
   </xsl:template>

   <xsl:template name="dup">
      <xsl:param name="input"/>
      <xsl:param name="count" select="2"/>
      <xsl:choose>
      <xsl:when test="not($count) or not($input)"/>
      <xsl:when test="$count = 1">
      <xsl:value-of select="$input"/>
      </xsl:when>
      <xsl:otherwise>
      
      <xsl:if test="$count mod 2">
      <xsl:value-of select="$input"/>
      </xsl:if>
      
      <xsl:call-template name="dup">
      <xsl:with-param name="input"
      select="concat($input,$input)"/>
      <xsl:with-param name="count"
      select="floor($count div 2)"/>
      </xsl:call-template>
      </xsl:otherwise>
   </xsl:choose>
</xsl:template>   

</xsl:stylesheet>