.. tab-set::
    :sync-group: category

    .. tab-item:: Label1
        :sync: key1

        Content 1

    .. tab-item:: Label2
        :sync: key2

        Content 2

.. tab-set::
    :sync-group: category

    .. tab-item:: Label1
        :sync: key1

        Content 1

    .. tab-item:: Label2
        :sync: key2

        Content 2