Q:

Make invisible body line box2d libgdx

I want to make these body lines invisible, because it's a lot that was left in the games, and that body circle too. The squares are of a layer tiled map.
The circle is a body of a sprite.
Circle and Squares in game

A:

You can enable or disable debug drawing different parts of your box2d world. You can set this flags in constructor:
// create renderer with default values
Box2DDebugRenderer debugRenderer = Box2DDebugRenderer(
                      /*drawBodies*/         true,
                      /*drawJoints*/         true,
                      /*drawAABBs*/          false,
                      /*drawInactiveBodies*/ true,
                      /*drawVelocities*/     false,
                      /*drawContacts*/       true)

or set only one flag (for example drawBodies):
debugRenderer.setDrawBodies(false);

Look also full API reference

