Q:

How to synchronously nest subarrays from one array into subarrays of another?

I have 2 multi-dimensional arrays:
$category = array (
    37 = array (id=1, name=joe, boss=kev)
    73 = array (id=55, name=diane, boss=rox)
    11 = array (id=4, name=bideo, boss=julia)
)  

$other_variable = array (
    1 = array (
        picture1 = array (name=zee, id=4),
        picture2 = array (name=izzy, id=1)
    )
    2 = array (
        picture1 = array (name=foo, id=55),
        picture2 = array (name=ido, id=44)        
    )
    3 = array (
        picture1 = array (name=wheez, id=87),
        picture2 = array (name=ardu, id=9)
    )
)  

I want to combine them so that 
$category = array (
    37 = array (
        id=1, 
        name=joe, 
        boss=kev, 
        other_variable = array (
            picture1 = array (name=zee, id=4),
            picture2 = array (name=izzy, id=1)
    ),

    73 = array (
        id=55, 
        name=diane, 
        boss=rox, 
        other_variable = array (
            picture1 = array (name=foo, id=55),
            picture2 = array (name=ido, id=44)
    ),
    11 = array (
        id=4, 
        name=bideo, 
        boss=julia, 
        other_variable = array (
            picture1 = array (name=wheez, id=87),
            picture2 = array (name=ardu, id=9)
    )
)  

I have tried
 $new_array = array_map(null, $category, $other_variable);  

That combines the two arrays, but it creates several nested levels in the array.  I am looking for something much cleaner that maintains $category as the parent array.

A:

Are you expecting something like this? Here we are using next and current function for incrementing internal pointer of array and getting current value.
Try this code snippet here
foreach($category as &$value)
{
    $value["other_variable"]=current($other_variable);
    next($other_variable);
}
print_r($category);

