That may requite quite a long answer. How familiar are you with Elgg plugin development? Which Elgg version are you developing for?

I had to do the same in an Elgg site. I solved this by using as base the Roles plugin (https://github.com/arckinteractive/Roles).

So in my_plugin_roles_extension I used the following hook:

elgg_register_plugin_hook_handler("roles:config", "role", "myplugin_roles_config", 550);

......

function myplugin_roles_config($hook_name, $entity_type, $return_value, $params) {
    $roles = array(
        DEFAULT_ROLE => array(
            'title' => 'roles:role:DEFAULT_ROLE',
            'permissions' => array(
                'pages' => array(
                    'blog/add' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'blog/add/{$self_guid}'=> array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'bookmarks/add' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'bookmarks/add/{$self_guid}'=> array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'file/add' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'file/add/{$self_guid}' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'pages/add' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'pages/add/{$self_guid}' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'blog/all' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'bookmarks/all' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'file/all' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'pages/all' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'activity/' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                    'members/' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
                ),
                'menus' => array(
                    'site::members' => array('rule' => 'deny'),
                    'site::activity' => array('rule' => 'deny'),
                    'page::groups:owned' => array('rule' => 'deny'),
                ),
            ),
        ),
    );
        
    if (!is_array($return_value)) {
        return $roles;
    }
    else {
        return array_merge($return_value, $roles);
    }
}

Of course I customized the main menu so the usual main options were not visible any more.

1. Little Experience.

2. Elgg 2.0.2

Nikos, thank you for your help,
this function can be in the file "start.php" my theme?

@Angelo Rocha: yes, it could be there. But you should read and understand how Roles plugin works in order to apply the right rules in the right way. This was just an example.

Hi Nikos, unfortunately for me it is not working, see how I did:

In my theme, in the file "start.php":

function change_roles_config( $hook_name, $entity_type, $return_value, $params ) {
   $roles = array(
      DEFAULT_ROLE => array(
         'title'       => 'roles:role:DEFAULT_ROLE',
         'permissions' => array(
            'pages' => array(
               'blog/add'                   => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'blog/add/{$self_guid}'      => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'bookmarks/add'              => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'bookmarks/add/{$self_guid}' => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'file/add'                   => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'file/add/{$self_guid}'      => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'pages/add'                  => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'pages/add/{$self_guid}'     => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'blog/all'                   => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'bookmarks/all'              => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'file/all'                   => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
               'pages/all'                  => array( 'rule' => 'deny', 'forward' => 'dashboard' ),
            ),
         ),
      ),
   );
   if ( ! is_array( $return_value ) ) {
      return $roles;
   } else {
      return array_merge( $return_value, $roles );
   }
}

elgg_register_plugin_hook_handler( "roles:config", "role", "change_roles_config", 550 );

But nothing happens, the intention is to make the blog modules, pages, files, etc. Available only for groups, there is another way? Sorry for my bad english.

elgg_register_plugin_hook_handler should be inside the init() function and change_roles_config should be outside the init() function.

So, your start.php will be like this:

<?php

elgg_register_event_handler('init', 'system', 'plugin_init');

function plugin_init() {
  elgg_register_plugin_hook_handler( "roles:config", "role", "change_roles_config", 550 );
}
  
function change_roles_config( $hook_name, $entity_type, $return_value, $params ) {
   ....
   ....
   ....
}

?>

Rohit. thanks for help, see my start.php in pastebin: http://pastebin.com/qCzRs892

Nothing happens.

Default users still have access to the modules on the dashboard.

Ooops...

Roles Mod on top.

Work Fine.