Instantiate Prefab By Name

Unity_InstantiatePrefabByName.cs

using UnityEngine;
using System.Collections;

public class LevelCloner : MonoBehaviour
{

	// Use this for initialization
	void Start ()
	{
		Debug.Log ("Enter!");
        // prefab must be under Assets/Resources <- important!!
		object o = Resources.Load ("Dungeon_Kit/Prefabs/Dungeon_Floors_Walls/floor_tile_01");

		Debug.Log (o.ToString ());

		var floorPrefab =  o as GameObject;



		for (int y = 0; y < 5; y++) 
		{
			for (int x = 0; x < 5; x++) 
			{
				GameObject floor = Instantiate (floorPrefab);
				// floor.AddComponent<Rigidbody> ();
				floor.transform.position = new Vector3 (x, 0, y);
			}
		}
	}
	
	// Update is called once per frame
	void Update ()
	{
	
	}
}