In the below XSL.

<xsl:param name="insert-file" as="document-node()" />
<xsl:template match="*">
<xsl:variable name="input">My text</xsl:variable> 
<xsl:variable name="Myxml" as="element()*"> 
    <xsl:call-template name="populateTag"> 
            <xsl:with-param name="nodeValue" select="$input"/> 
    </xsl:call-template> 
</xsl:variable>
<xsl:copy-of select="$Myxml"></xsl:copy-of>
</xsl:template>

<xsl:template name="populateTag"> 
    <xsl:param name="nodeValue"/> 
    <xsl:for-each select="$insert-file/insert-data/data">
        <xsl:choose> 
            <xsl:when test="@index = 1">
                <a><xsl:value-of select="$nodeValue"></xsl:value-of></a> 
            </xsl:when>             
        </xsl:choose> 
    </xsl:for-each> 
</xsl:template>

I am getting the output as:

<?xml version="1.0" encoding="UTF-8"?> <a>My text</a> <a>My text</a> <a>My text</a> <a>My text</a>

I want template "populateTag" to retun me the xml in the below format. How do i modify the template "populateTag" to achive the same.

Expected output from template "populateTag": <?xml version="1.0" encoding="UTF-8"?> <a><a><a><a>My text</a></a></a></a>

Please give your ideas.