$items['users/%/aprobar_solicitudes'] = array(
        'title'                         => 'Aprobar solicitudes',
        'page callback'     => 'solicitudes_mostrar_vista_form',
    'page arguments'        => array('1'),
    'access callback'       => 'user_access',
    'access arguments'  => array('aprobar solicitudes'),
    'weight'            => 6,
    'type'              => MENU_LOCAL_TASK,
    );