One way:


stop them being processed in the usual run of events:

<xsl:template match="file[@label="Help']" priority="1001"/>
<xsl:template match="file[@label="Logout']" priority="1001"/>

then after whichever apply-templates is processing the rest of the stuff
do

<xsl:for-each select="//file[@label='Help' or 'Label='Logout']">
  do something
</xsl:for-each>

David