Once the model is loaded by the controller all model methods are exposed to view

I believe this bit of code is what controls loading up those models to be accessible in a view:

PHP Code:

// This allows anything loaded using $this->load (views, files, etc.)
// to become accessible from within the Controller and Model functions.

$_ci_CI =& get_instance();
foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var)
{
    if ( ! isset($this->$_ci_key))
    {
        $this->$_ci_key =& $_ci_CI->$_ci_key;
    }
} 


It is found in system/ci/core/loader.php protected function _ci_load, at least in my version of CI.

Since it is used by several loaders you would want to include another variable flag in the calling function: 

PHP Code:

public function view($view, $vars = array(), $return = FALSE)
{
    return $this->_ci_load(array('_ci_view' => $view, '_ci_vars' => $this->_ci_object_to_array($vars), '_ci_return' => $return), $MY_NEW_BOOL_FLAG);
    //You could also add '_ci_prevent_model_load' => true to the data package and check for that in _ci_load, that's cleaner and follows their convention
} 


Add that flag to the _ci_load() function, and then when it's true you could probably do something like check if(is_subclass_of($_ci_CI->$_ci_key, 'CI_Model')) then don't load it.

The function opens with:

PHP Code:

// Set the default data variables
foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val)
{
    $$_ci_val = ( ! isset($_ci_data[$_ci_val])) ? FALSE : $_ci_data[$_ci_val];
} 


so it seems like your $vars data would still be loaded up.

I haven't tried this, but if it doesn't work just like that I think it would put you on the path to getting things to work as you like.