highchart mysql json issue

I'm new using json, mysql and php. I want to retrieve data from my mysql database into json and send it to highcharts.

I have some data that is stored in different tables.

I want to acheive this result:

[[name1,value1],[name2,value2],...]

I'm using this code in my data.php file:

$result = mysql_query("SELECT name, value FROM table1, table2");


$rows = array();
while($r = mysql_fetch_array($result)) {
$row[0] = $r[0];
$row[1] = $r[1];
array_push($rows,$row);
}

 print json_encode($rows, JSON_NUMERIC_CHECK);

The output of this code gives this results:

[[name1,value1],[name2,value2],[name1,value2],[name2,value1],... ]  

so instead of having each name with its value I get each name with all the values.

How can I fix this?

EDIT:

sorry for the ambiguity here a summury:

     table 1            table 2 
name    other data  value   other data 
name 1  data 1      value 1    data 1
name 2  data 2      value 2    data 2
name 3  data 3      value 3    data 3
name 4  data 4      value 4    data 4
name 5  data 5      value 5    data 5
name 6  data 6      value 6    data 6
name 7  data 7      value 7    data 7
name 8  data 8      value 8    data 8
name 9  data 9      value 9    data 9
name 10 data 10     value 10    data 10
name 11 data 11     value 11    data 11
name 12 data 12     value 12    data 12
name 13 data 13     value 13    data 13


obtained json           desired json    

name 1  value 1         name 1  value 1
name 1  value 2         name 2  value 2
name 1  value 3         name 3  value 3
name 1  value 4         name 4  value 4
name 1  value 5         name 5  value 5
name 1  value 6         name 6  value 6
name 1  value 7         name 7  value 7
name 1  value 8         name 8  value 8
name 1  value 9         name 9  value 9
name 1  value 10        name 10 value 10
name 1  value 11        name 11 value 11
name 1  value 12        name 12 value 12
name 1  value 13        name 13 value 13
name 2  value 1             
name 2  value 2             
name 2  value 3             
name 2  value 4             
name 2  value 5             
  .       .
  .       .
name 13 value 13