<?php

$arr = Array (
	0 => Array ( 0 => 10 ),
	1 => Array ( 0 => 20 ),
	2 => Array ( 0 => 30 ),
	3 => Array ( 0 => 40 ),
	4 => Array ( 0 => 50 )
);
foreach($arr as $value){
	echo $value[0]. " ";
}