Odds are that at some point during the interview process you will be asked why you are leaving your present job or why you left your past job. Even if you left on negative terms due to the way management operated the company, avoid making unpleasant remarks about your opinion of management or co-workers. Always keep the conversation positive and moving towards the objective of how you will be able to help the company you are interviewing for, in the position you are being considered for.
Instead of focusing on the negative, focus on the way you believe your previous job has prepared you for this current position. When you get into the interview, always keep the age old age of 'if you cannot say something nice...' in the back of your mind and think before you speak. Odds are if you speak badly about a previous employer you will not be hired because the interviewer will believe when you leave them you will speak negatively of them also.