From this page you can set the various interfaces.
It is sometimes useful to divide one physical network (such as an Ethernet segment) into two separate network segments without having to create IP subnets and use a router to connect the segments together. A device that connects two networks together in this fashion is called a bridge. A FreeBSD system with two network interface cards can act as a bridge.
In order to set up a wireless access point with FreeBSD, you need to have a compatible wireless card. If you want to bridge all traffic between the wireless device and the network attached to the wired network card, then choose the devices and renable the bridge.