Laravel 5.1 : seed data from CSV files located in your {app}/database/seeds/CSV_FILES folder , first line of CSV must be table headings and consecutive lines the data to seed , no need to change the table structure in seeder , just change in CSV file .

DatabaseSeeder.php

<?php

use Illuminate\Database\Seeder;
use Illuminate\Database\Eloquent\Model;

class DatabaseSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        Model::unguard();

         $this->call(AdminFoodIngredients::class);

        Model::reguard();
    }
}

define('CSV', base_path('database/seeds/CSV_FILES/'));

class AdminFoodIngredients extends Seeder {

    public function run() {

        $table_name = "admin_food_ingredients";
        // delete the existing table
        DB::table($table_name)->delete();

        $wholeCSVData = array_map('str_getcsv', file(CSV . '/'.$table_name.'.csv'));

        $i = "first_value";
        foreach ($wholeCSVData as $single) {
            if ($i == "first_value") {
                foreach ($single as $key => $heading) {
                    $column_headings[] = $heading;
                }
                $i = "not_first_value" ;
                continue ;
            } // the first row in the csv file contains the headings


            $theVal = [];
            foreach ($single as $key => $row_value) {

                // uncomment below when you have password in the csv and want to create a hash for it 
                // --useful for users table
                
                // when inserting the password create the hash of the password
                // and store the real password in another row
              /*  if($column_headings[$key] == "password") {
                    $theVal['password'] = Hash::make($row_value);
                    $theVal['password_real'] = $row_value ;
                    continue ;
                }*/
                
                $theVal[$column_headings[$key]] = $row_value;

            } // after this loop we'll have one row prepared

            DB::table($table_name)->insert($theVal);

        }
    }

}