master.xml

<products>
<section id="1" handle="products">Products</section>
<entry id="1">
  <name handle="batman-bar">Batman Bar</name>
</entry>
<entry id="13">
  <name handle="birthday-party-ice-cream-sandwich">Birthday Party Ice Cream Sandwich</name>
</entry>
<entry id="15">
  <name handle="bubblegum-bar">Bubblegum Bar</name>
</entry>
<entry id="8">
  <name handle="bubblegum-snow-cone">Bubblegum Snow Cone</name>
</entry>
<entry id="17">
  <name handle="champ-king-size-bunny-tracks-cone">Champ! King Size Bunny Tracks Cone</name>
</entry>
<entry id="31">
  <name handle="chill-double-lemon-cup">Chill Double Lemon Cup</name>
</entry>
<entry id="19">
  <name handle="chips-galore">Chips Galore!</name>
</entry>
<entry id="11">
  <name handle="chips-galore">Chocolate Lover's Big Dipper</name>
</entry>
</products>

master.xsl

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

	<xsl:output method="xml" indent="yes" />

	<xsl:template match="/">
		<ul>
			<xsl:apply-templates select="products/entry[1]" mode="li" />
		</ul>
	</xsl:template>

	<xsl:template match="entry" mode="li">
		<li>
			<div class="row">
				<xsl:apply-templates select=". | following-sibling::entry[1]" />
			</div>

			<xsl:if test="following-sibling::entry[2]"> <!-- don't display empty rows -->
				<div class="row">
					<xsl:apply-templates select="following-sibling::entry[2] | following-sibling::entry[3]" />
				</div>
			</xsl:if>
		</li>

		<xsl:apply-templates select="following-sibling::entry[4]" mode="li" />
	</xsl:template>

	<xsl:template match="entry">
		<div>
			<xsl:value-of select="name" />
		</div>
	</xsl:template>

</xsl:stylesheet>