Seeing a bridle in your dream symbolizes control and points to significant aspects of your life. It may represent your partner or spouse, indicating authority or a lack thereof in your relationship. The bridle can also signify a battlefield, suggesting mental stress or struggle. Additionally, if you are holding the bridle, it indicates that you possess power and resources in your life.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Bridle" (page 58).
In a dream, a bridle represents a wife, a battlefield, or a sickness. A bridle in a dream also means obedience, servitude or submission and wealth in the hands of the one who sees himself holding it. If a traveller sees a bridle in a dream, it means slow coming news from home. Ifa sick person sees the bridle of a horse in his dream, it means shattering of his hopes. If a traveller sees a bridle in his dream, it means being forsaken by others. A bridle in a dream also could mean protection from sin. (Also see Rein)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.