Не работает фильтр по производителю.

<option value="{@id}">
            <xsl:if test="@id = /shop/producer_id">
               <xsl:attribute name="selected"> </xsl:attribute>
            </xsl:if>
            <xsl:value-of disable-output-escaping="yes" select="name"/>
         </option>

<option value="{@id}">
            <xsl:if test="@id = /shop/producer_id">
               <xsl:attribute name="selected"> </xsl:attribute>
            </xsl:if>
            <xsl:value-of disable-output-escaping="yes" select="shop_producers_list_name"/>
         </option>