If a recipe calls for alcohol or liqueur as an ingredient, but you prefer to use something non-alcoholic, a general rule of thumb is to substitute the same amount (volume) of another liquid in the recipe as originally called for with alcohol.
Chicken broth or apple juice is a good substitute for wine, but it really depends on the recipe. If the recipe calls for orange liqueur, you can substitute orange juice, etc. You can use flavored extracts mixed with water to make enough liquid called for (1/2 tsp. orange extract plus 5 1/2 tsp. water, for example).
Use your imagination and experiment.