2 ways I know you can do it.
1. Turn off context sensitve ribbon switching - by setting the RIBBONCONTEXTSELECT to 0 (The same as going into the Options dialogue, -> Selection tab, -> select the Contextual Tab States... button and select "Do not switch to contextual tab on selection" then click "Ok" and "Ok,) - but this turns off contextual tab switching for all objects.

2. Do as I have done. - go into the cui editor and remove the "Layout Tools" tab from the "Layout Tools" node under the Ribbon Contextual Tab States in the acad.cuix (which is usually loaded as a partial customization file - It may be under another CUIX so check the "Layout Tools node under the Ribbon Contextual Tab States of all the load Cuix's just in case)
Regards
Andrew