Wordpress Custom Post Admin Meta Box

<?php


//Create Custom Post
function rapanui_productos() {
    $labels = array(
        'name'               => _x( 'Productos', 'post type general name' ),
        'singular_name'      => _x( 'Producto', 'post type singular name' ),
        'add_new'            => _x( 'Add New', 'Event' ),
        'add_new_item'       => __( 'Add New Producto' ),
        'edit_item'          => __( 'Edit Producto' ),
        'new_item'           => __( 'New Producto' ),
        'all_items'          => __( 'All Productos' ),
        'view_item'          => __( 'View Producto' ),
        'search_items'       => __( 'Search Productos' ),
        'not_found'          => __( 'No productos found' ),
        'not_found_in_trash' => __( 'No productos found in the Trash' ),
        'parent_item_colon'  => '',
        'menu_name'          => 'Productos'
    );
    $args = array(
        'labels'        => $labels,
        'description'   => 'Productos de Rapa Nui Chocolates',
        'public'        => true,
        'show_ui' => true,
        'capability_type' => 'page',
        'hierarchical' => true,
        'menu_position' => 6,
        'has_archive'   => false,
        'rewrite' => array('slug' => __('productos') , 'with_front' => true ),
        //'rewrite' => false,
        'query_var' => true,
        'supports'      => array( 'title', 'editor', 'thumbnail', 'excerpt', 'author','custom-fields', 'revisions','page-attributes','post-formats' ),
    );
    register_post_type( 'productos', $args );
}
add_action( 'init', 'rapanui_productos' );

//Add custom messages

function productMessages( $messages ) {
    global $post, $post_ID;
    $messages['productos'] = array(
        0 => '',
        1 => sprintf( __('Producto updated. <a href="%s">View product</a>'), esc_url( get_permalink($post_ID) ) ),
        2 => __('Custom field updated.'),
        3 => __('Custom field deleted.'),
        4 => __('Producto updated.'),
        5 => isset($_GET['revision']) ? sprintf( __('Producto restored to revision from %s'), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
        6 => sprintf( __('Producto published. <a href="%s">View Producto</a>'), esc_url( get_permalink($post_ID) ) ),
        7 => __('Producto saved.'),
        8 => sprintf( __('Producto submitted. <a target="_blank" href="%s">Preview Producto</a>'), esc_url( add_query_arg( 'preview', 'true', get_permalink($post_ID) ) ) ),
        9 => sprintf( __('Producto scheduled for: <strong>%1$s</strong>. <a target="_blank" href="%2$s">Preview Producto</a>'), date_i18n( __( 'M j, Y @ G:i' ), strtotime( $post->post_date ) ), esc_url( get_permalink($post_ID) ) ),
        10 => sprintf( __('Producto draft updated. <a target="_blank" href="%s">Preview Producto</a>'), esc_url( add_query_arg( 'preview', 'true', get_permalink($post_ID) ) ) ),
    );
    return $messages;
}
add_filter( 'post_updated_messages', 'productMessages' );

// ----------------------------------------------------------------------------------------------
// Start Custom Meta Box Stuff ------------------------------------------------------------------

// Admin Meta Box for Products

add_action( 'add_meta_boxes', 'product_data_box' );
function product_data_box() {
    add_meta_box(
        'product_data_box',
        __( 'Product Information', 'myplugin_textdomain' ),
        'product_data_box_content',
        'productos',
        'normal',
        'core',
        'low'
    );
}


// The Product Admin  Metabox

function product_data_box_content() {
    global $post;

    // Noncename needed to verify where the data originated
    echo '<input type="hidden" name="product_noncename" id="product_noncename" value="' . wp_create_nonce( plugin_basename(__FILE__) ) . '" />';

    // Get the location data if its already been entered
    $product_title = get_post_meta($post->ID, 'product_title', true);
    $product_desc = get_post_meta($post->ID, 'product_desc', true);
    $small_img = get_post_meta($post->ID, 'small_img', true);
    $large_img = get_post_meta($post->ID, 'large_img', true);

    // Echo out the field
    echo '<label>Titulo del Producto';
    echo '<input type="text" name="product_title" value="' . $product_title  . '" class="widefat" />';
    echo '</label>';
    echo '<label>Descripción del Producto';
    echo '<textarea type="text" name="product_desc" class="widefat" >' . $product_desc . '</textarea>';
    echo '</label>';
    echo '<label>Imagen Pequeña';
    echo '<input type="text" name="small_img"  value="' . $small_img . '" class="widefat" />';
    echo '</label>';
    echo '<label>Imagen Grande';
    echo '<input type="text" name="large_img" value="' . $large_img  . '" class="widefat" />';
    echo '</label>';

}

// Save the Metabox Data

function events_meta_save($post_id, $post) {

    // verify this came from the our screen and with proper authorization,
    // because save_post can be triggered at other times
    if ( !wp_verify_nonce( $_POST['eventmeta_noncename'], plugin_basename(__FILE__) )) {
    return $post->ID;
    }

    // Is the user allowed to edit the post or page?
    if ( !current_user_can( 'edit_post', $post->ID ))
        return $post->ID;

    // OK, we're authenticated: we need to find and save the data
    // We'll put it into an array to make it easier to loop though.

    $events_meta['product_title'] = $_POST['product_title'];
    $events_meta['product_desc'] = $_POST['product_desc'];
    $events_meta['small_img'] = $_POST['small_img'];
    $events_meta['large_img'] = $_POST['large_img'];

    // Add values of $events_meta as custom fields

    foreach ($events_meta as $key => $value) { // Cycle through the $events_meta array!

        if( $post->post_type == 'revision' ) return; // Don't store custom data twice

        $value = implode(',', (array)$value); // If $value is an array, make it a CSV (unlikely)

        if(get_post_meta($post->ID, $key, FALSE)) { // If the custom field already has a value

            update_post_meta($post->ID, $key, $value);

        } else { // If the custom field doesn't have a value
            add_post_meta($post->ID, $key, $value);
        }
        if(!$value) delete_post_meta($post->ID, $key); // Delete if blank
    }

}

// End Custom Meta Box Stuff
//--------------------------------------------------------------------------------------------




// Moving the editor lower in the Edit Page bellow my newly created Custom Meta Box

    add_action( 'add_meta_boxes', 'action_add_meta_boxes', 0 );
    function action_add_meta_boxes() {
        global $_wp_post_type_features;
            if (isset($_wp_post_type_features['productos']['editor']) && $_wp_post_type_features['productos']['editor']) {
                unset($_wp_post_type_features['productos']['editor']);
                add_meta_box(
                    'description_section',
                    __('Description'),
                    'inner_custom_box',
                        'productos', 'normal', 'low'
                );
            }
    add_action( 'admin_head', 'action_admin_head'); //white background
    }
    function action_admin_head() {
    ?>
    <style type="text/css">
        .wp-editor-container{background-color:#fff;}
    </style>
    <?php
    }
    function inner_custom_box( $post ) {
    echo '<div class="wp-editor-wrap">';
    //the_editor is deprecated in WP3.3, use instead:
    wp_editor($post->post_content, 'content', array('dfw' => true, 'tabindex' => 1) );
    //the_editor($post->post_content);
    echo '</div>';
    }