$i = 0;
$ii = 0;
$queries = array();
foreach ($array as $key) {

    if ($i > 5) {
        $i = 0;
        $ii++;
        $queries[$ii] = "INSERT INTO xx (row1,row2,row3) VALUES ";
    }
    $values = "(" . $key["row1"] . "," . $key["row2"] . "," . $key["row3"] . ") ";
    $queries[$ii] .= $values;

    $i++;

}