Add a collection list, and create a list of buttons that will be used as individual buttons for each of the tabs, connecting the text of each button with a field from the CMSÂ collection. (You can use the 'Name' of the collection item, or create a new field just for the tabs menu text.)
Add a collection list, and add the content of what you want to reveal when the user selects an item in the tabs menu. In Webflow, keep all of the different content items visible. The tool will hide the 'in-active' tab content on the published site.