Disable Ctrl-H, Ctrl-P, and other Mac keyboard shortcuts
OS X uses Emacs-like keybindings in most text editing windows.  Normally you would change them to another text editing function but I don't know about functions like next tab or open a file.  Those would be mapped in the System Preferences > Keyboard > Shortcuts window from a key to a menu in the IntelliJ app.

But, if it can accept the Emacs keybindings for other functions, try customizing it yourself.  Edit the ~/Library/KeyBindings/DefaultKeyBinding.dict file (creating the KeyBindings folder and the dict file if they don't exist) with something like this.

{
    "~d" = "deleteWordForward:";
    "^w" = "deleteWordBackward:";


Save/exit then quit/restart the IntelliJ app (you don't need a reboot) and see if Option-d deletes the next word and Control-w deletes previous word.  If it works, research the Emacs bindings for next tab and open file.

Good luck!