class Post extends AppModel {
    public $actsAs = array('Containable');

array(
    (int) 0 => array(
        'Post' => array(
            'id' => '1',
            'title' => 'This is the first post',
            'slug' => 'this-is-the-first-post',
            'body' => 'body body 111body body 111body body 111body body 111body body 111body body 111body body 111',
            'image_id' => '0',
            'language' => 'sv',
            'translation_id' => '0',
            'created' => '2012-09-03 17:45:57',
            'modified' => '2012-09-03 19:12:21'
        ),
        'Image' => array(
            'id' => null,
            'name' => null,
            'url' => null,
            'alt' => null,
            'description' => null
        ),
        'Asset' => array(),
        'Readmore' => array(),
        'Reference' => array(),
        'Category' => array(),
        'Course' => array(),
        'Tag' => array(),
        'User' => array(
            (int) 0 => array(
                'password' => '*****',
                'id' => '2',
                'username' => 'test0',
                'fullname' => 'Test Test',
                'url' => '',
                'email' => '',
                'role' => 'admin',
                'phone' => '+',
                'created' => '2012-09-03 17:44:22',
                'PostsUser' => array(
                    'id' => '1',
                    'post_id' => '1',
                    'user_id' => '2'
                )
            ),
            (int) 1 => array(
                'password' => '*****',
                'id' => '1',
                'username' => 'test1',
                'fullname' => 'Frank',
                'url' => '',
                'email' => '',
                'role' => 'admin',
                'phone' => '',
                'created' => '2012-09-03 17:41:25',
                'PostsUser' => array(
                    'id' => '3',
                    'post_id' => '1',
                    'user_id' => '1'
                )
            )
        )
    ),

echo h($post['Post']['title']);

echo h($post['User']['fullname']);

echo h($post['User'][0]['fullname']);

<?php
foreach($post['User'] as $user) {
    echo h($user['fullname']);
});