ArrayMixer.php

<?php
class ArrayMixer
{
	function __construct($options)
	{
		$this->options = $options;
		$this->result = array();
	}

	function go($arr, $x)
	{
		$x++;
		if (count($this->options) == $x) { $this->result[] = $arr; return; }
		foreach($this->options[$x] as $i)
		{
			$arr2 = $arr; 
			$arr2[] = $i;
			$this->go($arr2, $x);
		}		
	}
	
	function mix()
	{
		$this->go(array(),-1);
		return $this->result;
	}
}

$options = array(
		array('a','b','c'),
		array('1','2'),
		array('X','Y')
);

$a = new ArrayMixer($options);
var_dump($a->mix());