I would use 3 divs (lets call them AB and C) as columns
They will have style = "float: left; width: 32%;" * CAN note width can be less than 32% and can be set to px
A will contain 1 and 4, while B will contain 2 and 5. Finally, C will contain 3 and 6.
There is absolutely no need for plugins, and it can (and currently by me) be done only with CSS.
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