As far as I understood guidelines for posting, i feel, that once the post is published the article either in 'forum' or 'resources', it may not be possible to change from forum to resources or vice-versa. Within the posted category changes may be made if required. For this open to the article concerned. Open the edit provision and make changes in the type and category by opening the drop down menu on top by selecting the appropriate item from the dropped down topics.
Ramanathan A R