Adding tabs in WordPress is a simple process. First, open the WordPress admin area and navigate to the Appearance > Widgets menu. On the Widgets page, click the Add New Widget button and enter the following information in the Text Widget field:
Name: Tabbed Content
Description: Shows a tabbed content area with a list of posts.
Click the Save button to create the Tabbed Content widget.
To add a tab to the Tabbed Content widget, click on the Tab button ( ) and enter the post ID for the post you want to tab into in the Tab input field. Click on the Save button to add the tab.
To close the Tabbed Content widget, click on the X in the top-right corner of the widget.
Now that the Tabbed Content widget is installed and configured, you can access the tabbed content area by clicking on the Tab button ( ) and navigating to the post you want to view. The posts will be listed in reverse chronological order, and the current post will be highlighted in green.