<xsl:template match="begin" mode="inline">
<xsl:variable name="mnum" select="concat('m', substring(@id, 2))" />
<span class="theme-begin" fid="{substring(@id, 2)}">
+ <a name="m{substring(@id, 2)}" />
<xsl:value-of select="string(following::motyw[@id=$mnum]/text())" />
</span>
</xsl:template>