<?php

$a=array(
  array('','2020/10/01','2020/10/02'),
  array('09:00','3','3'),
  array('10:00','6','0'),
  array('11:00','9','6'),
);
function print_a($a){
  array_map(function($v){ echo implode("\t",$v),"\n"; },$a);
  echo "\n";
}
print_a($a);
print_a(array_map(null, ...$a));