Nikita Panuhin

$rows = array();
$arr = json_decode($tv, true);
foreach ($arr as $item){
	array_push($rows, $item[$field]);
}
$rows = array_unique($rows);

$out = array();
foreach ($rows as $item) {
	array_push($out, trim(explode("|", $item)[0]));
}

print_r($out);

Array ( [0] => France [1] => Japan [2] => Germany [3] => Chech Republick )