Dynamic numbers of column in 1 row - xslt

Question

i have number of categories that i want to separate it into rows, the number of category in a row will base on $catsInLine. The $catsInLine are digit from 1 to 12. Each category will be wrap by DIVs with class from span1 to span 12. And the categories will be wrap again with <div class="row-fluid"> for each row.
I tried below for hours and no luck getting the correct result.
<div class="row-fluid">
<xsl:variable name="catsInLine">
<xsl:value-of select="categories_in_line" />
</xsl:variable>
<xsl:variable name="column">
<xsl:value-of select="(12 div $catsInLine)" />
</xsl:variable>
<xsl:for-each select="categories/category">
<xsl:if test="position() mod $catsInLine = 1 or position() = 1">
<xsl:text disable-output-escaping="yes"><div class="row-fluid"></xsl:text>
</xsl:if>
<div class="span{$column}">
<xsl:call-template name="category" />
</div>
<xsl:if test="position() mod $catsInLine = 0 or position() = last()">
<xsl:text disable-output-escaping="yes"></div></xsl:text>
</xsl:if>
</xsl:for-each>
</div>
assume the $catsInLine is 2,the result i wish to get is
<div class="row-fluid">
<div class="span6">
<a>Category1</a>
</div>
<div class="span6">
<a>Category2</a>
</div>
</div>
<div class="row-fluid">
<div class="span6">
<a>Category3</a>
</div>
<div class="span6">
<a>Category4</a>
</div>
</div>
if the $catsInLine is 1, the result should be
<div class="row-fluid">
<div class="span12">
<a>Category1</a>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<a>Category2</a>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<a>Category3</a>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<a>Category4</a>
</div>
</div>

Answer 1

Please try this:
<xsl:apply-templates select="categories/category[position() mod $catsInLine = 1 or
$catsInLine = 1]"
mode="row" />
<!-- Separate template -->
<xsl:template match="category" mode="row">
<div class="row">
<xsl:apply-templates
select=". | following-sibling::category[position() < $catsInLine]" />
</div>
</xsl:template>