Download to toolbox then load into your project with:
run('../path_to/cell_array_of_strings_to_delimited_string/load_function.m')
CellArray = {'one', 'two'};
a_string = cell_array_of_strings_to_delimited_string( CellArray )
> 'one, two'
It can accept an optional delimiter (the defaul is ', '):
a_string = cell_array_of_strings_to_delimited_string( CellArray, '-' )
> 'one-two'