CATIA CAD software can generally export its own drawings (.catdrawing) to several formats including the common DXF exchange format (.dxf). But it is likely that more programs are capable of catdrawing to dxf conversion, including some dedicated CAD converters, such as CrossManager which supports various CAD/3D drawing conversions.
Open CATDRAWING file Open DXF fileA CAD converter with huge format support
A 3D CAD translation software