PHP使用父数组包装数组

I have a structure as below:

array (size=1)
  0 => 
      array (size=2)
        0 => string
        1 => string

array (size=2)
  0 => 
      array (size=2)
        0 => string
        1 => string
  1 => 
      array (size=2)
        0 => string
        1 => string

What I want to do is wrapping this arrays with a "parent" array like I show below:

array
 0=> array (size=1)
      0 => 
          array (size=2)
            0 => string
            1 => string

 1=>  array (size=2)
        0 => 
           array (size=2)
            0 => string
            1 => string
        1 => 
            array (size=2)
             0 => string
             1 => string

How can I achieve this?

Thank you!

EDIT

$__server_description_path_data = explode('}', $data);

    foreach ($__server_description_path_data as $value) {
        $_server_description_path_data[] = trim($value, '{HEX');
    }

    foreach ($_server_description_path_data as $value) {
        $server_description_path_data[] = explode(":", $value);
    }

The snippet above gives me structure like 1st part (array) of the question. What I'd like to do is getting a structure as in my second part of my question.

EDIT2

array
  0=> array
       0=> array
          0=> string
          1=> string
array
  0=> array
      0=> array
          0=> string

presuming your top code shows two var_dumps, i have called the arrays array1 & array2:

$parent=array($array1, $array2);

EDIT so var_dump($server_description_path_data); provides the top output? if so how about:

$wrapper= array($server_description_path_data);
var_dump($wrapper);

$new_big_array = array($old_array1, $old_array2);

$array1 = array(1,2,3);
$array2 = array(3,4,5);
$array3 = array($array1, $array2);