Maybe someone will help me because documentation isn’t helping. So i got this code:

/*
Title: realization
Description: basic parameters
Template: realizations
Context: normal
Priority: high
Order: 1
Collapse: false
Meta box: false
*/

piklist('field', array(
    'type' => 'group'
    ,'label' => __('Tasks') 
    ,'columns' => 12
    ,'add_more' => true
    ,'scope' => 'post_meta'
    ,'field' => 'test_field'
    ,'serialize' => 'true'
    ,'fields' => array(
        array(
            'type' => 'text'
            ,'field' => 'city'
            ,'columns' => 12
        ),
        array(
            'type' => 'text'
            ,'field' => 'name'
            ,'columns' => 12
        )
    )
));

And i have a couple of questions:

1.
when i save something and use get_post_meta to retrieve it and dump it to the screen with var_dump i get something like this:
"a:2:{s:4:"city";a:2:{i:0;s:5:"test1";i:1;s:5:"test3";}s:4:"name";a:2:{i:0;s:5:"test2";i:1;s:5:"test4";}}"
How to parse this into something more readable?

2.
I can’t see this in standard custom fields metabox, why?