i am getting array output as:

Code:
Array ( [0] => Array ( [0] => 000000 [1] => 000400 [2] => 000450 ) ) Array ( [0] => Array ( [0] => 000350 [1] => 000400 ) )
i want output like this:

Code:
Array ( [0] => Array ( [0] => 000000 [1] => 000400 [2] => 000450 ) ) Array ( [1] => Array ( [0] => 000350 [1] => 000400 ) )
my php code is:

Code:
$select = mysql_query("SELECT ac_no, cust_name, GROUP_CONCAT(install_amt SEPARATOR ',') as installamt FROM ankali_slabpay  WHERE agent_id=$agent_id GROUP BY ac_no");
while($row1 = mysql_fetch_array($select)){
$a = $row1['installamt'];
$outerARR = explode(" ", $a);
$arr = array();
foreach ($outerARR as $arrvalue){
    $innerarr = explode(",", $arrvalue);
    $arr[] = $innerarr;
}
print_r($arr);
}