PHP Change Array Structure / Format - php

Question

I have an array at present that looks like this:
Array
(
[0] => Array
(
[language] => English
)
[1] => Array
(
[language] => Arabic
)
[2] => Array
(
[language] => Bengali
)
)
What I'd like to do is change it so it looks like this:
Array
(
[language] => Array
(
[0] => English
[1] => Arabic
[2] => Bengali
)
)
I also have an array that looks like this:
Array
(
[id] => 3
[name] => lethalMango
[joined] => 2010-01-01 00:00:00
)
And I'd like to change it to:
Array
(
[user] => Array
(
[id] => 3
[name] => lethalMango
[joined] => 2010-01-01 00:00:00
)
)
I've tried a number of methods without much success but I'm sure there is an more efficient way.

Answer 1

FIRST :
$result = array();
foreach($array as $value){
$result['language'][]= $value['language']
}
SECOND :
$result['user'] = $array;

Answer 2

Second
$result = array('user'=>$array);