<?php

$data = array(
	'A' => array(10,20,30),
	'B' => array(100,200,300),
	'C' => array(1000,2000,3000)
	);

$data_new = array();
foreach($data as $key => $values)
{
	if (is_array($values))
	{
	    for($i = 0; $i < count($values); $i++)
	    {
	        $data_new[$i][] = array_shift($data[$key]); 		
	    }	
	}
	
}

print_r($data_new);