ionic diable ion-tab-button code example
Example: ionic1 disable tab
<ion-tab id="tab2" disabled="disableTab2" title="Tab2" icon-off='ion-off' icon-on='ion-on' href="#/tab/tab2">
<ion-tab id="tab2" disabled="disableTab2" title="Tab2" icon-off='ion-off' icon-on='ion-on' href="#/tab/tab2">