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 $args10      */11     function start_el( &$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     }