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@ 2019-07-29T09:48:29Z

<?php

$arr = [
   [
        'cards1' => [
            'A',
            'b',
            'c'
        ],
        'cards2' => [
            'A',
            'e',
            'd'
        ],
        'cards3' => [
            'A',
            'o',
            'l'
        ]
    ],
    [
         'cards1' => [
            'A',
            'b',
            'c'
        ],
        'cards2' => [
            'A',
            'r',
            'c'
        ],
        'cards3' => [
            'A',
            'bbb',
            'yyy'
        ]
    ],
    [
         'cards1' => [
            'A',
            'bbb',
            'ggg'
        ],
        'cards2' => [
            'A',
        ],
        'cards3' => [
            'A',
        ]    
    ]
];

$set = [];

foreach($arr as &$data){
    foreach($data as &$cards){
        foreach($cards as $index => $value){
            if(isset($set[$value])) unset($cards[$index]);
            else  $set[$value] = true;
        }
    }
}

print_r($arr);

Output for 7.1.25 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14: Array ( [0] => Array ( [cards1] => Array ( [0] => A [1] => b [2] => c ) [cards2] => Array ( [1] => e [2] => d ) [cards3] => Array ( [1] => o [2] => l ) ) [1] => Array ( [cards1] => Array ( ) [cards2] => Array ( [1] => r ) [cards3] => Array ( [1] => bbb [2] => yyy ) ) [2] => Array ( [cards1] => Array ( [2] => ggg ) [cards2] => Array ( ) [cards3] => Array ( ) ) )

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