SiteCliq editor allows you to add a pre-made block with tabs or enable tabs mode in some of the existing blocks.
Here's a good example of block with tabs:
1. To add a block with tabs, open the blocks gallery and choose a suitable block with tabs:
2. Hover over the content of the block and click on the "gear" to access the Collection settings. In the pop-up window, navigate to the Modes tab and choose the type, quantity, and alignment of your tabs:

Some blocks in our gallery can contain a set of entirely interdependent elements gathered in a collection. Each item in a collection keeps the same layout as others — if you delete an element from one item in a collection, it will be automatically deleted from every item.
The collection blocks can be re-structured into tabs.

1. For that, hover over the collection item and click on the "gear" in the top right corner to access its settings:

1. To rename a tab, click on its name, highlight it and add a new one:

2. To access the tabs settings, hover over the collection element and click on three stripes icon:
Don't forget to publish your site for the changes to appear live.