$arr = array("<小刚>","<小晓>","<小飞>","<小李>","<小红>");
function arrContentReplact($array)
{
if(is_array($array))
{
foreach($array as $k => $v)
{
$array[$k] = arrContentReplact($array[$k]);
}
}else
{
$array = str_replace(array('<', '>'), array('{', '}'), $array);
}
return $array;
}

$arr3 = arrContentReplact($arr);

echo "

";
    print_r($arr3);
    echo "