remove NSTabView, NSTableView item programmatically

// NSTabView
[pTabView removeTabViewItem:[pTabView tabViewItemAtIndex:nIdx]];

// NSTableView
// szID : TableView's column Identifier
// get using [tableClumn identifier]
[pTableView removeTableColumn:[pTableView tableColumnWithIdentifier:szID]];

[reference]

NSTabView

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSTabView_Class/Reference/Reference.html

NSTableView

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSTableView_Class/Reference/Reference.html