PARSHAS VOESCHANAN Zohar disagrees with R.Shimon bar Yochai-

Shkalim 16b

For a detailed discussion if Reb Shimon Ben Yochai wrote 

the zohar click HERE

Shkalim 16b

“How were the Luchos written? R. Chanina ben Gamliel says 5 dibros on each Luach (5+5) - 

The Rabanan say 10 on each Luach (10 +10)

R. Shimon bar Yochai says 20 on each Luach (20+20).  10 in the front& 10 in the back of each Luach. R. Simai says 40  on each Luach

(40+40) 10 dibros on all 4 sides of each Luach.”

 

The Zohar* holds, like Reb Chanina ben Gamliel. that it  had only 5 dibros on each Luach.(5+5)

It seems , the Zohar disagrees with Reb Shimon bar Yochai,

who said each Luach had 10 dibros on both sides. (20+20)

     

*Parshas Yisro, Rashi Shir Hashirim # 4:5