Auto add pages to category menu

Question

I have created a custom post type called Products, on the product pages i have a menu in the left sidebar. This menu is made up of categories for the products.

Is it possible to have my products automatically added to the category menu based the category of the product?

For example, i make a product, i give it a category of blue. Where blue appears in the menu the product will automatically be added underneath blue.

Is this possible?

Thanks

Update: To be more clear i'm using a plugin called Jquery Accordion Menu and the menu uses a widget. It still uses the built-in wordpress menu system. The Jquery Accordion Widget effectively just styles the menu, in the widget settings you pick what menu you want it to show.

I've found this code inside the plugin file after the comments below. I don't know if it's any help.

        function widget($args, $instance) {
            extract( $args );
            // Get menu

            if(! isset($instance['speed']) ){ $instance['speed'] = 'slow'; }

            $widget_options = wp_parse_args( $instance, $this->defaults );
            extract( $widget_options, EXTR_SKIP );

            $nav_menu = wp_get_nav_menu_object( $instance['nav_menu'] );

            if (!$nav_menu)
                    return;

            $instance['title'] = apply_filters('widget_title', $instance['title'], $instance, $this->id_base);

            $classMenu = ($instance['classMenu'] != '') ? $instance['classMenu'] : 'menu';

            echo $args['before_widget'];

            if ( !empty($instance['title']) )
                    echo $args['before_title'] . $instance['title'] . $args['after_title'];

            ?>

            <div class="dcjq-accordion" id="<?php echo $this->id.'-item'; ?>">

                    <?php
                            wp_nav_menu(
                                    array(
                                            'fallback_cb' => '',
                                            'menu' => $nav_menu,
                                            'container' => false,
                                            'menu_class' => $classMenu
                                            )
                                    );
                    ?>

            </div>
            <?php

            echo $args['after_widget'];
    }

EDIT 2: If i can get this working without the plugin then that's great. I just need some sort of menu that displays categories and the pages for that category automatically.

Answer 1

Yes, it's possible.

Depending on the way you build your menu, you'd have to call the posts like this (fill in placeholders):

// Call/Query the posts related to the category:
$your_cat_related_cpts = get_posts( array(
     'post_type' => 'YOUR_CUSTOM_POST_TYPE'
    ,'category' => 'YOUR_CATEGORY'
) );
// Append them to your menu:
foreach ( $your_cat_related_cpts as $content )
{
    echo $content->post_title;
}

Answer 2

I've found this plugin that does exactly what i needed.

http://wordpress.org/extend/plugins/collapsing-categories/