makeTreeByObectMap.js

function makeTree(list, node) {  
  const map = {};
  const tree = [];
  
  for(let i = 0; i < list.length; i++){
    map[list[i].id] = list[i];
    map[list[i].id].children = [];
  }
  
 for(let i = 1; i < list.length; i++){
    item = map[i];
    if (item.parent_id !== null) {
      map[item.parent_id].children.push(item);
    }
    else {
      tree.push(item);
    }
  }

  console.log(tree);
}

var data2 = [
  {
    title: "Одежда",
    parent_id: null,
    id: 1,
  },
  {
    title: "Мужская",
    parent_id: 1,
    id: 2,
  },
  {
    title: "Костюмы",
    parent_id: 2,
    id: 3,
  },
  {
    title: "Платья",
    parent_id: 7,
    id: 4,
  },
  {
    title: "Юбки",
    parent_id: 7,
    id: 5 ,
  },
  {
    title: "Блузы",
    parent_id: 7,
    id: 6,
  },
  {
    title: "Женская",
    parent_id: 1,
    id: 7,
  },
  {
    title: "Брюки",
    parent_id: 3,
    id: 8,
  },
  {
    title: "Жакеты",
    parent_id: 3,
    id: 9,
  },
  {
    title: "Вечерние",
    parent_id: 4,
    id: 10,
  },
  {
    title: "Летние",
    parent_id: 4,
    id: 11,
  }
];