Selectable categories and products in magento admin -

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goal

i upgrading custom in-house module magento ee. module groups clients , has special rules can applied group or individuals of group. need add tab allows, on per group basis, select items and/or categories. when selected people within group not allowed see categories or products.

what have

i have the tab created , know need on front-end achieve goals. issue creating selector. have played couple hours , made no real headway of yet. have been doing magento development past 5 weeks, new framework.

what need with

i select categories , items in same fashion when go catalog->categories->manage categories. left column has tiered list. have 1 check boxes selection. when looking @ promotions->shopping cart rules->actions(tab), select rule, choose actions tab. in second fieldset, if add new rule 'category' , select icon tiered tree want. same idea products, okay if different. need able both ways.

i need able store selected values, , retrieve them (easy once know how store them).

please provide code, guidance, or links tutorials in ball park. appreciated. i'm sure generic option of being able select things in manner helpful all.


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