php如何替换数组元素？

<?php
 
$arr = array();
$array = array(
    0 => array(shop_name=>1,shop_id=>2),
    1 => array(shop_name => 2, shop_id=>3)
);
 
for($i=0; $i<count($array); $i++) {
    $arr[$i][name] = $array[$i][shop_name];
$arr[$i][id]=$array[$i][shop_id];
}
echo '<pre>';
print_r ($arr);
echo '</pre>';
 
?>

<?php
    $arr = array("<小刚>","<小晓>","<小飞>","<小李>","<小红>");
    function arrContentReplact($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 "<pre>";
    print_r($arr3);
    echo "</pre>";
?>

Array
(
    [0] => {小刚}
    [1] => {小晓}
    [2] => {小飞}
    [3] => {小李}
    [4] => {小红}
)