zeusflys

I originally commented out the code as suggested above, but I combined the WPAC_Nav_Menu_Walker class with the bootstrap nav walker I was using (see here https://github.com/twittem/wp-bootstrap-navwalker/tree/For-Bootstrap-2.3.2)

I am using bootstrap 2.x and wordpress 3.6

I used it to hide a menu item and its dropdown menu, so I’m not sure how it will work with individual links.

In my wordpress-access-control.php is is lines 37 to 303.
Replace with the following:

// We check to see if the class exists because it isn't part of pre WordPress 3 systems
if ( class_exists( 'Walker_Nav_Menu' ) ) {
	add_filter( 'wp_nav_menu_args', array( 'WordPressAccessControl', 'wp_nav_menu_args' ) );

	/**
	 * A custom walker that checks our conditions to make sure the user has
	 * permission to view the page linked to from the menu item
	 *
	 * @author Brandon Wamboldt
	 * @package WordPress
	 * @subpackage WordPressAccessControl
	 */
	class WPAC_Nav_Menu_Walker extends Walker_Nav_Menu
	{
		var $in_private = false;
		var $private_lvl = 0;

		function start_lvl( & $output, $depth )
		{
			if ( ! $this->in_private ) {
				$indent = str_repeat( "\t", $depth );
				$output	   .= "\n$indent<ul class=\"dropdown-menu\">\n";
				//$indent = str_repeat( '    ', $depth );
				//$output .= "\n$indent<ul class=\"sub-menu\"><li style='display:none;'></li>\n";
			}
		}

		/*function end_lvl( & $output, $depth )
		{
			if ( ! $this->in_private ) {
				$indent = str_repeat( '    ', $depth );
				$output .= "$indent</ul>\n";
			}
		}*/

		function start_el( & $output, $item, $depth=0, $args = array(), $id = 0  )
		{
			global $wp_query;

			if ( WordPressAccessControl::check_conditions( $item->object_id ) || get_option( 'wpac_show_in_menus', 'with_access' ) == 'always' ) {
				if ( ! $this->in_private ) {
					$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

					if (strcasecmp($item->title, 'divider')) {

					$class_names = $value = '';

					$classes = empty( $item->classes ) ? array() : (array) $item->classes;

					$classes[] = ($item->current) ? 'active' : '';

					$classes[] = 'menu-item-' . $item->ID;

					$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );

					if ($args->has_children && $depth > 0) {

						$class_names .= ' dropdown-submenu';

					} else if($args->has_children && $depth === 0) {

						$class_names .= ' dropdown';

					}

					$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

					$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );

					$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

					$output .= $indent . '<li' . $id . $value . $class_names .'>';

					$attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';

					$attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';

					$attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';

					$attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

					$attributes .= ($args->has_children) 	    ? ' data-toggle="dropdown" data-target="#" class="dropdown-toggle"' : '';

					$item_output = $args->before;

					$item_output .= '<a'. $attributes .'>';

					$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;

					$item_output .= ($args->has_children && $depth == 0) ? ' <b class="caret"></b></a>' : '</a>';

					$item_output .= $args->after;

					$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );

				} else {

					$output .= $indent . '<li class="divider">';

				}
				}
			} else {
				$this->in_private = true;
				$this->private_lvl++;
			}
		}

			/**

	 * Traverse elements to create list from elements.

	 *

	 * Display one element if the element doesn't have any children otherwise,

	 * display the element and its children. Will only traverse up to the max

	 * depth and no ignore elements under that depth. 

	 *

	 * This method shouldn't be called directly, use the walk() method instead.

	 *

	 * @see Walker::start_el()

	 * @since 2.5.0

	 *

	 * @param object $element Data object

	 * @param array $children_elements List of elements to continue traversing.

	 * @param int $max_depth Max depth to traverse.

	 * @param int $depth Depth of current element.

	 * @param array $args

	 * @param string $output Passed by reference. Used to append additional content.

	 * @return null Null on failure with no changes to parameters.

	 */

	function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) {

		if ( !$element ) {

			return;

		}

		$id_field = $this->db_fields['id'];

		//display this element

		if ( is_array( $args[0] ) ) 

			$args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] );

		else if ( is_object( $args[0] ) ) 

			$args[0]->has_children = ! empty( $children_elements[$element->$id_field] ); 

		$cb_args = array_merge( array(&$output, $element, $depth), $args);

		call_user_func_array(array(&$this, 'start_el'), $cb_args);

		$id = $element->$id_field;

		// descend only when the depth is right and there are childrens for this element

		if ( ($max_depth == 0 || $max_depth > $depth+1 ) && isset( $children_elements[$id]) ) {

			foreach( $children_elements[ $id ] as $child ){

				if ( !isset($newlevel) ) {

					$newlevel = true;

					//start the child delimiter

					$cb_args = array_merge( array(&$output, $depth), $args);

					call_user_func_array(array(&$this, 'start_lvl'), $cb_args);

				}

				$this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );

			}

				unset( $children_elements[ $id ] );

		}

		if ( isset($newlevel) && $newlevel ){

			//end the child delimiter

			$cb_args = array_merge( array(&$output, $depth), $args);

			call_user_func_array(array(&$this, 'end_lvl'), $cb_args);

		}

		//end this element

		$cb_args = array_merge( array(&$output, $element, $depth), $args);

		call_user_func_array(array(&$this, 'end_el'), $cb_args);

	}

		/*function end_el( & $output, $item, $depth )
		{
			if ( WordPressAccessControl::check_conditions( $item->object_id ) || get_option( 'wpac_show_in_menus', 'with_access' ) == 'always' ) {
				if ( ! $this->in_private ) {
					$output .= "</li>\n";
				}
			} else {
				$this->private_lvl--;

				if ( $this->private_lvl == 0 ) {
					$this->in_private = false;
				}
			}
		}*/
	}
}