May we also suggest:

<ss:foreach item="product" within="$product.relatedProducts"> <ss:set name='varType' value="$product"/> <ss:set name='varKeys' value="false"/> <ss:if test="$string.indexOf($varType.customText6, 'kw:') > -1"> <ss:set name='varKeys' value="$string.replace($varType.customText6, 'kw:', '')"/> <ss:if test="$urlflag == 'true'"> <ss:set name='newUrl' value="$productPrefix"/> <ss:set name='newUrl' value="$string.concat($newUrl, $string.concat($string.encode($string.replace($varType.name, '/', '')), '/'))"/> <ss:if test="$varKeys != 'false'"> <ss:set name='newUrl' value="$string.concat($newUrl, $string.concat($varKeys, '/'))"/> <ss:set name='newUrl' value="$string.concat($newUrl, $string.concat($varType.productnumber, '/'))"/> <ss:if test="$counter.currentrow == '1'"> <ss:if test="$math.modulus($counter.currentrow, 3) == 0"> <ss:else/> <ss:if test="$math.modulus($counter.currentrow, 3) == 0">