ViewBag.disciplines = new SelectList(db.Disciplines, "IdDiscipline", "IntituleDiscipline");

<div class="form-group" id="checkboxes">
    <label class="control-label col-md-2" for="discipline"> Discipline :  </label>
    <div class="col-md-10">
        @foreach (var item in ViewBag.disciplines)
        {
            <input type="checkbox"
                 value="@ViewBag.disciplines.IntituleDiscipline"
                 name="@ViewBag.disciplines.IntituleDiscipline"
                 id="@ViewBag.disciplines.IdDiscipline">
        }
    </div>
</div>

@foreach (var item in ViewBag.disciplines)
        {
           <input type="checkbox" value="@item.IntituleDiscipline" name="@item.IntituleDiscipline" id="@item.IdDiscipline">
        }