tab navigation: css sample

• tab1

  1. 1-1
  2. 1-2
  3. 1-3
  4. 1-4

• tab2

  1. 2-1
  2. 2-2
  3. 2-3
  4. 2-4

• tab3

  1. 3-1
  2. 3-2
  3. 3-3
  4. 3-4