Hidden

PHP

<?php

$tea_content = array(
    array(
        'type' => 'hidden',
        'id' => 'my_hidden_field_id',
        'default' => 'Haha I will dominate the World!!! MOUAHAHAHAHAHA - Crazy Penguin',
    ),
);

Retrieve data

Using the _get_option('my_hidden_field_id') method, you'll get (with a json_encode() display):

JSON

"Haha I will dominate the World!!! MOUAHAHAHAHAHA - Crazy Penguin"