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A project I inherited had a dozen custom post types. Trouble is, they all come off the admin menu sidebar separately. It's not very tidy. Is there a plugin where I can make these subitems of a parent menu, or is there a way, programmatically, I can edit my theme's functions.php to make it make these as submenus?

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up vote 7 down vote accepted

On the function to register a new custom post type can you set this CPT as Submenu to a exist menu item. Use the param show_in_menu

A example:

    apply_filters( 'wpit_register_issue_post_type', 
            'labels'          => $issue_labels,
            'rewrite'         => $issue_rewrite,
            'supports'        => $issue_supports,
            'taxonomies'      => $issue_taxonomies,
            'menu_position'   => 5,
            'public'          => TRUE,
            'show_ui'         => TRUE,
            'show_in_menu'    => 'edit.php',
            'can_export'      => TRUE,
            'capability_type' => 'post',
            'query_var'       => TRUE

You find the string for the items on mouse over, like upload.phpon the item Media.

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I used this handy generator to create a Custom Post Type, and then I installed the free Admin Menu Editor plugin and created a custom menu called "Management" with slug/hook as "mgmt". Next, all I had to do in my auto-generated custom post type code was add the line 'show_in_menu' => 'mgmt', and sure enough -- she works! Thanks so much! – Volomike Oct 25 '12 at 21:09
Welcome. For each job give it an generator ;) – bueltge Oct 25 '12 at 21:32
Yeah, I can't always trust generators to be on the web, so I need to just build my own PHP script that replicates this. Plus, it's pretty easy to use the add_menu_page() function to create the "Management" menu instead of using the Admin Menu Editor. – Volomike Oct 26 '12 at 0:35

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