How to change the index name of array - php

Question

I have a multidimensional array,
I'm recursively changing values of array with I need.
It is working for keys which are not array.
But not for keys which are array.
How can I change value of one to test like "one" => "test",
$arr = array(
'one' => array(
array('something' => 'value'),
array('something2' => 'value2'),
'another' => 'anothervalue'
),
'two' => array(
array('something' => 'value'),
array('something2' => 'value2'),
'another' => 'anothervalue'
)
);
function update_something(&$item, $key)
{
if($key == 'one')
$item = 'test';
}
array_walk_recursive($arr, 'update_something');
EXPECTED ARRAY STRUCTURE IS
array(
'one' => 'test',
'two' => array(
array('something' => 'value'),
array('something2' => 'value2'),
'another' => 'anothervalue'
)
);
UPDATE2
$html_structure = array(
array(
'tag' => 'div',
'class' => 'lines',
array(
'tag' => 'div',
'one' => array(
'tag' => 'div',
array(
'tag' => 'span',
'style' => 'margin:10px; padding:10px',
'key' => 'title',
),
'key' => 'subject',
)
)
)
);
UPDATE3
$array = array(
array(
'tag' => 'div',
'class' => 'lines',
array(
'tag' => 'div',
'repeat' => array(
'tag' => 'div',
array(
'tag' => 'span',
'style' => 'margin:10px; padding:10px',
'key' => 'title',
),
'key' => 'subject',
)
)
)
);
function update_recursively($array, $key = '', $value = array()) {
//print_r($array); print_r($value);
foreach ($array as $k => $v) {
if ($k === $key){
$array[$k] = $value;
}
elseif (is_array($v))
$array[$k] = update_recursively($v);
}
return $array;
}
print_r(update_recursively($array, 'repeat', array('d' => 'a')));

Answer 1

If you array isn't too large, something like this would work:
function update_recursively($array) {
foreach ($array as $k => $v) {
if ($k === 'one')
$array[$k] = 'test';
elseif (is_array($v))
$array[$k] = update_recursively($v);
}
return $array;
}
$updated_arr = update_recurisvely($arr);
But you need to be a bit careful if it's really big as it can get slow and memory intensive. Note that it won't update your old array, like array_walk_recursive would, it will return an updated version instead.
* UPDATE *
Version that handles the Update3 scenario where we specify key to look for and value to replace it with.
function update_recursively($array, $key = '', $value = array()) {
foreach ($array as $k => $v) {
if ($k === $key)
$array[$k] = $value;
elseif (is_array($v))
$array[$k] = update_recursively($v, $key, $value);
}
return $array;
}

Answer 2

You can try:
function update_something(&$item, $key) {
if($key == 'one') {
array_splice($item,0,'test');
}
}