Related forum topic: http://forums.codeblocks.org/index.php/topic,20175.0.html
Code completion is not working with some classes; wxDataViewCtrl, wxDataViewTreeCtrl, wxDataViewListCtrl and wxDataViewItem are the ones i've checked. The project builds and runs ok by the way. I can see and select, for example m_dataViewCtrl1 but when i enter -> nothing shows up. I tried some other classes like wxDataViewModel and wxPropertyGrid, code completion works fine with them.
Code::Blocks svn 10091
Windows 8.1
tdm64-gcc-4.7.1-3
wxWidgets-3.0.2 (build configuration: MONOLITHIC=1 SHARED=1 UNICODE=1 BUILD=debug and release)
wxFormBuilder v3.5
The patch in Re: Code Completion problem with some wx classes should fix your issue.
Fixed in trunk r10218