1 /**
 2      * @see Walker::start_el()
 3      * @since 3.0.0
 4      *
 5      * @param string $output Passed by reference. Used to append additional content.
 6      * @param object $item Menu item data object.
 7      * @param int $depth Depth of menu item. Used for padding.
 8      * @param int $current_page Menu item ID.
 9      * @param object $args
10      */
11     function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
12         $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
13 
14         $class_names = $value = '';
15 
16         $classes = empty( $item->classes ) ? array() : (array) $item->classes;
17         $classes[] = 'menu-item-' . $item->ID;
18 
19         $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );
20         $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
21 
22         $id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );
23         $id = $id ? ' id="' . esc_attr( $id ) . '"' : '';
24 
25         $output .= $indent . '<li' . $id . $value . $class_names .'>';
26         
27         //此处新增开始
28         if($item->type=="custom")
29         {
30             $item->target="_blank";
31         }
32         //此处新增结束    
33 
34         $atts = array();
35         $atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
36         $atts['target'] = ! empty( $item->target )     ? $item->target     : '';
37         $atts['rel']    = ! empty( $item->xfn )        ? $item->xfn        : '';
38         $atts['href']   = ! empty( $item->url )        ? $item->url        : '';
39 
40         $atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args );
41 
42         $attributes = '';
43         foreach ( $atts as $attr => $value ) {
44             if ( ! empty( $value ) ) {
45                 $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
46                 $attributes .= ' ' . $attr . '="' . $value . '"';
47             }
48         }
49 
50         $item_output = $args->before;
51         $item_output .= '<a'. $attributes .'>';
52         $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
53         $item_output .= '</a>';
54         $item_output .= $args->after;
55 
56         $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
57     }