Putting default text in table of contents

Is there a way to have some default text always display in the table of contents drop-down list (when it is not expanded). For example, have it display 'Course module or topic' all time instead of the current topic or page name.Is there a way to have some default text always display in the table of contents drop-down list (when it is not expanded). For example, have it display 'Course module or topic' all time instead of the current topic or page name.

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