这是经过测试的解决方案-

// Your sample array 
$sample_array = array(
    0 => array(
        \'meta_key\' => \'cpf_first_name\',
        \'meta_value\' => \'John\'
    ),

    1 => array(
        \'meta_key\' => \'cpf_first_name\',
        \'meta_value\' => \'James\'
    ),

    2 => array(
        \'meta_key\' => \'cpf_first_name\',
        \'meta_value\' => \'Jane\'
    ),

    3 => array(
        \'meta_key\' => \'cpf_gender\',
        \'meta_value\' => \'Male\'
    ),

    4 => array(
        \'meta_key\' => \'cpf_gender\',
        \'meta_value\' => \'Male\'
    ),

    5 => array(
        \'meta_key\' => \'cpf_gender\',
        \'meta_value\' => \'Female\'
    ),

    6 => array(
        \'meta_key\' => \'cpf_last_name\',
        \'meta_value\' => \'Doe\'
    ),

    7 => array(
        \'meta_key\' => \'cpf_last_name\',
        \'meta_value\' => \'Doe\'
    ),

    8 => array(
        \'meta_key\' => \'cpf_last_name\',
        \'meta_value\' => \'Doe\'
    ),

);

// Here starts the real code
$headers = [];
$bodys = [];
foreach ( $sample_array as $array ) {
    if ( $array[\'meta_key\'] == \'cpf_first_name\' ){
        $bodys[\'cpf_first_name\'][] = $array[\'meta_value\'];
        if ( !in_array(\'cpf_first_name\', $headers) )
            $headers[] = \'cpf_first_name\';
    } elseif ( $array[\'meta_key\'] == \'cpf_last_name\' ) {
        $bodys[\'cpf_last_name\'][] = $array[\'meta_value\'];
        if ( !in_array(\'cpf_last_name\', $headers) )
            $headers[] = \'cpf_last_name\';
    } else {
        $bodys[\'cpf_gender\'][] = $array[\'meta_value\'];
        if ( !in_array(\'cpf_gender\', $headers) )
            $headers[] = \'cpf_gender\';
    }
}

$body_cpf_gender = $bodys[\'cpf_gender\'];
unset($bodys[\'cpf_gender\']);
$bodys[\'cpf_gender\'] = $body_cpf_gender;
$headers= array_diff($headers, array(\'cpf_gender\'));
array_push($headers, \'cpf_gender\');
echo \'<table>\';
?>
<thead>
    <tr>
        <?php
        foreach ( $headers as $header ) {
            echo \'<th>\' . $header . \'</th>\';
        }
        ?>
    </tr>
</thead>
<tbody>
    <?php for ( $i = 0; $i < count($bodys[\'cpf_gender\']); $i++) { ?>
    <tr>
        <?php foreach ( $headers as $header) { ?>
            <td><?php echo $bodys[$header][$i]; ?></td>
        <?php } ?>
    </tr>
    <?php } ?>
</tbody>
<?php
echo \'</table>\';
// Here ends the real code