集合操作、したいやん？

invoker.php

<?php

class Invoker implements ArrayAccess {
	private $targets;

	public function __construct(array $targets) {
		$this->targets = $targets;
	}

	public function __call($method, array $args) {
		$results = array();
		foreach($this->targets as $target) {
			$results[] = call_user_func_array(array($target, $method), $args);
		}

		return $results;
	}

	public function offsetExists($offset) {
		return isset($this->targets[$offset]);
	}

	public function offsetGet($offset) {
		return $this->targets[$offset];
	}

	public function offsetSet($offset, $value ) {
		$this->targets[$offset] = $value;
	}

	public function offsetUnset($offset) {
		unset($this->targets[$offset]);
	}
}

class Hoge {
	private $name;

	public function __construct($name) {
		$this->name = $name;
	}

	public function getName() {
		return $this->name;
	}
}

$list = new Invoker(array(
	new Hoge('John'),
	new Hoge('Bob'),
	new Hoge('Ryan'),
	new Hoge('Tom'),
));

var_dump($list->getName());
var_dump($list->getName()[0]);
var_dump($list[0]->getName());

// array(4) {
//   [0]=>
//   string(4) "John"
//   [1]=>
//   string(3) "Bob"
//   [2]=>
//   string(4) "Ryan"
//   [3]=>
//   string(3) "Tom"
// }
// string(4) "John"
// string(4) "John"