(function($){
    var options;
    $.fn.main(opts){
    	options = opts;
    	//rest of code
    }
    $.fn.otherFunc(){
    	//does something with options
    }
}(jQuery));

$("#div1, #div2, #div3, #div4, #div5").main(opts);

var opts1 = {...};
$("#div1").main(opts1);

var opts2 = {...};
$("#div2").main(opts2);

// etc.

(function($){
    var options;
    $.fn.main = function(opts){
        options = opts;
        //rest of code
        alert(options.text);
    }
    $.fn.otherFunc = function(){
        //does something with options
    }
})(jQuery);

$('a:first').main({text:'txt'});
$('a:last').main({text:'some other text'});