Mysql Auto increment value in select grouped by Id - mysql

Question

I have 3 MySql tables and I need to use some information to populate a new table.
SELECT table1.products_id as 'ID',
concat(table2.table2_name,':',table2.table2_name,':0') as 'att',
concat(table3.table3_name,':',(#cnt := #cnt + 1)) as 'val'
FROM table1, table2, table3
CROSS JOIN (SELECT #cnt := 0) AS dummy
WHERE table1.options_id=table2.table2_id
AND table1.options_values_id=table3.table3_id
AND table2.language_id=4 AND table3.language_id=4
Using this query I obtain all these (correct) informations
+++++++++++++++++++++++++++++++++++++
+ ID + att + val +
+++++++++++++++++++++++++++++++++++++
+ 22 + Taglia:Taglia:0 + S:1 +
+ 22 + Taglia:Taglia:0 + M:2 +
+ 22 + Taglia:Taglia:0 + L:3 +
+ 55 + Taglia:Taglia:0 + S:4 +
+ 55 + Taglia:Taglia:0 + M:5 +
+ 60 + Taglia:Taglia:0 + 1:6 +
+ 60 + Taglia:Taglia:0 + 2:7 +
+ 60 + Taglia:Taglia:0 + 3:8 +
+ 62 + Taglia:Taglia:0 + 8,5:9 +
+++++++++++++++++++++++++++++++++++++
but I need that the autoincrement value restart when ID change, like this:
+++++++++++++++++++++++++++++++++++++
+ ID + att + val +
+++++++++++++++++++++++++++++++++++++
+ 22 + Taglia:Taglia:0 + S:1 +
+ 22 + Taglia:Taglia:0 + M:2 +
+ 22 + Taglia:Taglia:0 + L:3 +
+ 55 + Taglia:Taglia:0 + S:1 +
+ 55 + Taglia:Taglia:0 + M:2 +
+ 60 + Taglia:Taglia:0 + 1:1 +
+ 60 + Taglia:Taglia:0 + 2:2 +
+ 60 + Taglia:Taglia:0 + 3:3 +
+ 62 + Taglia:Taglia:0 + 8,5:1 +
+++++++++++++++++++++++++++++++++++++
How can I do this ?
Partially solved...
#Shadow comment guide me in the right way, but I'm doing something wrong :(
NEW QUERY
SET #num := 0, #type := '';
SELECT *
FROM ( select table1.products_id as id, concat(table2.table2_name,':',table2.table2_name,':0') as 'attributo',concat(table3.table3_name,':',#num) as 'valore' FROM table1, table2, table3
WHERE table1.options_id=table2.table2_id AND table1.options_values_id=table3.table3_id AND table2.language_id=4 AND table3.language_id=4
ORDER BY `table1`.`products_id` ASC) as table_name2
WHERE 0 <= GREATEST(
#num := IF(#type = id, #num + 1, 1),
LEAST(0, LENGTH(#type := id)))
NEW RESULT
+++++++++++++++++++++++++++++++++++++
+ ID + att + val +
+++++++++++++++++++++++++++++++++++++
+ 22 + Taglia:Taglia:0 + S:2 +
+ 22 + Taglia:Taglia:0 + M:4 +
+ 22 + Taglia:Taglia:0 + L:6 +
+ 55 + Taglia:Taglia:0 + S:2 +
+ 55 + Taglia:Taglia:0 + M:4 +
+ 60 + Taglia:Taglia:0 + 1:2 +
+ 60 + Taglia:Taglia:0 + 2:4 +
+ 60 + Taglia:Taglia:0 + 3:6 +
+ 62 + Taglia:Taglia:0 + 8,5:2 +
+++++++++++++++++++++++++++++++++++++
Where I'm wrong?