If not empty, this allows you to format the value of this field using HTML, allowing you to do things like link or mark up the output. You may use these placeholders: {$value} - the field's display value; {$valueUrl} - the field's display value for use in a URL, {$choice} - the underlying value of the chosen option, and {$fieldId} - the ID of this field (beziehungsstatus).
And how can I do in order that the value entered by the user in his profile field can put X or Y image. For example the user have to choose btw 1 or 2, if he choose 1 it will show the image of a 1 and if he choose two it will put a image of the number 2.
In order to help you properly we will need to see the full code that you are using. Otherwise it will be a guess game which is a waste of time for everyone included, for you and everyone that will try to help you out.