There are broadly three approaches to heroin addiction.
The first is simply to withdraw from the drug, and to deal with the withdrawal symptoms as they occur (the so-called 'cold turkey' approach).

A second approach, and certainly the most commonplace is the prescribing of the drug Methadone. This is a heroin substitute, and while it does not lead to the euphoria which is reported by users of heroin, it does effectively prevent withdrawal symptoms. The Methadone dose is then slowly reduced.

A third approach is rarer, and involves the use of the drug Naltrexone. This is an opiate antagonist, which means that it effectively prevents the heroin from having its effect on the brain. It is used after physical withdrawal has been completed, to prevent relapse - as long as the recovering addict is continuing to take the antagonist, heroin will have no effect, even if he/she is tempted to relapse. 

I do not know of any psychological therapy that can prevent the physical withdrawal symptoms.  However, once a person has become free of physical addiction there often remains a very powerful psychological addiction, so that some heroin addicts may have completed physical withdrawal many times, only to return later to using the drug.  My experience is that, once an addict has completed physical withdrawal, hypnotherapy may enable him/her to stay free.