JSFiddle - React, Tailwind, and code Playground

JavaScript

function fisherYates(myArray) {
    for(var i = 0; i< myArray.length; i++) {
        k = myArray[i].length;
        while(k--){
            j = Math.floor(Math.random() * (myArray.length - 1));
            tempk = myArray[i][k];
            tempj = myArray[i][j];
            myArray[i][k] = tempj;
            myArray[i][j] = tempk;
        }
    }
}

multArr = [[1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15], [16, 17, 18, 19, 20], [21, 22, 23, 24, 25]];
        //fisherYates(multArr[0][0],[0][1],[0][2],[0][3],[0][4]);
        fisherYates(multArr);
        alert(multArr);