Как перебрать массивы используя foreach?

Здравствуйте имеется массив $item, при распечатке массива там есть такие данные

[pictures] => Array
        (
            [0] => Array
                (
                    [url] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1qn8UHpXXXXcmXXXXXXXXXXXX_!!0-item_pic.jpg
                    [ismain] => true
                    [small] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1qn8UHpXXXXcmXXXXXXXXXXXX_!!0-item_pic.jpg_100x100.jpg
                    [medium] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1qn8UHpXXXXcmXXXXXXXXXXXX_!!0-item_pic.jpg_310x310.jpg
                    [large] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1qn8UHpXXXXcmXXXXXXXXXXXX_!!0-item_pic.jpg_600x600.jpg
                )

            [1] => Array
                (
                    [url] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1WyHEGVXXXXbvXFXXXXXXXXXX_!!0-item_pic.jpg
                    [ismain] => false
                    [small] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1WyHEGVXXXXbvXFXXXXXXXXXX_!!0-item_pic.jpg_100x100.jpg
                    [medium] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1WyHEGVXXXXbvXFXXXXXXXXXX_!!0-item_pic.jpg_310x310.jpg
                    [large] => http://img02.taobaocdn.com/bao/uploaded/i2/TB1WyHEGVXXXXbvXFXXXXXXXXXX_!!0-item_pic.jpg_600x600.jpg
                )

            [2] => Array
                (
                    [url] => http://img04.taobaocdn.com/bao/uploaded/i4/1852243062/TB2pPS1bFXXXXcuXXXXXXXXXXXX_!!1852243062.jpg
                    [ismain] => false
                    [small] => http://img04.taobaocdn.com/bao/uploaded/i4/1852243062/TB2pPS1bFXXXXcuXXXXXXXXXXXX_!!1852243062.jpg_100x100.jpg
                    [medium] => http://img04.taobaocdn.com/bao/uploaded/i4/1852243062/TB2pPS1bFXXXXcuXXXXXXXXXXXX_!!1852243062.jpg_310x310.jpg
                    [large] => http://img04.taobaocdn.com/bao/uploaded/i4/1852243062/TB2pPS1bFXXXXcuXXXXXXXXXXXX_!!1852243062.jpg_600x600.jpg
                )

            [3] => Array
                (
                    [url] => http://img03.taobaocdn.com/bao/uploaded/i3/1852243062/TB2fWFZbpXXXXa_XXXXXXXXXXXX_!!1852243062.jpg
                    [ismain] => false
                    [small] => http://img03.taobaocdn.com/bao/uploaded/i3/1852243062/TB2fWFZbpXXXXa_XXXXXXXXXXXX_!!1852243062.jpg_100x100.jpg
                    [medium] => http://img03.taobaocdn.com/bao/uploaded/i3/1852243062/TB2fWFZbpXXXXa_XXXXXXXXXXXX_!!1852243062.jpg_310x310.jpg
                    [large] => http://img03.taobaocdn.com/bao/uploaded/i3/1852243062/TB2fWFZbpXXXXa_XXXXXXXXXXXX_!!1852243062.jpg_600x600.jpg
                )

            [4] => Array
                (
                    [url] => http://img01.taobaocdn.com/bao/uploaded/i1/1852243062/TB2fADTbVXXXXbZXXXXXXXXXXXX_!!1852243062.jpg
                    [ismain] => false
                    [small] => http://img01.taobaocdn.com/bao/uploaded/i1/1852243062/TB2fADTbVXXXXbZXXXXXXXXXXXX_!!1852243062.jpg_100x100.jpg
                    [medium] => http://img01.taobaocdn.com/bao/uploaded/i1/1852243062/TB2fADTbVXXXXbZXXXXXXXXXXXX_!!1852243062.jpg_310x310.jpg
                    [large] => http://img01.taobaocdn.com/bao/uploaded/i1/1852243062/TB2fADTbVXXXXbZXXXXXXXXXXXX_!!1852243062.jpg_600x600.jpg
                )

        )

Так вот, как мне перебрать данные используя foreach, что бы выводить картинку [small].

Я могу лишь так выводить, к примеру первую картинку
<?=$item['pictures'][0] ['small']?>

Но так вручную выводить каждую картинку это просто жесть, так как количество картинок для разных товаров может быть разное. Так как мне быть?