public class StructureMapControllerFactory : DefaultControllerFactory
    {
        protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
        {
            if (controllerType == null && requestContext.HttpContext.Request.Url != null)
                return base.GetControllerInstance(requestContext, controllerType);

            return ObjectFactory.GetInstance(controllerType) as Controller;
        }
    }

public class Person
{
        //...
        public virtual IList<Center> PreferedCenters { get; set; }
        public virtual IList<Center> ActiveCenters { get; set; }

        public Person()
        {
            PreferedCenters = new List<Center>();
            ActiveCenters = new List<Center>();
        }
}

public class Center
{
    //...
    public virtual IList<Person> Persons { get; set; }

    public Center()
    {
        Persons = new List<Person>();
    }
}